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Chiesa A, Garlatti E, Mezzadri M, Celada L, Sessoli R, Wasielewski MR, Bittl R, Santini P, Carretta S. Many-Body Models for Chirality-Induced Spin Selectivity in Electron Transfer. NANO LETTERS 2024; 24:12133-12139. [PMID: 39306768 PMCID: PMC11450995 DOI: 10.1021/acs.nanolett.4c02912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 08/23/2024] [Accepted: 08/23/2024] [Indexed: 10/03/2024]
Abstract
We present the first microscopic model for the chirality-induced spin selectivity effect in electron-transfer, in which the internal degrees of freedom of the chiral bridge are explicitly included. By exactly solving this model on short chiral chains we demonstrate that a sizable spin polarization on the acceptor arises from the interplay of coherent and incoherent dynamics, with strong electron-electron correlations yielding many-body states on the bridge as crucial ingredients. Moreover, we include the coherent and incoherent dynamics induced by interactions with vibrational modes and show that they can play an important role in determining the long-time polarized state probed in experiments.
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Affiliation(s)
- Alessandro Chiesa
- Dipartimento
di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN−Sezione
di Milano-Bicocca, gruppo collegato di Parma, 43124 Parma, Italy
- Consorzio
Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali
(INSTM), I-50121 Firenze, Italy
| | - Elena Garlatti
- Dipartimento
di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN−Sezione
di Milano-Bicocca, gruppo collegato di Parma, 43124 Parma, Italy
- Consorzio
Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali
(INSTM), I-50121 Firenze, Italy
| | - Matteo Mezzadri
- Dipartimento
di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN−Sezione
di Milano-Bicocca, gruppo collegato di Parma, 43124 Parma, Italy
| | - Leonardo Celada
- Dipartimento
di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN−Sezione
di Milano-Bicocca, gruppo collegato di Parma, 43124 Parma, Italy
| | - Roberta Sessoli
- Consorzio
Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali
(INSTM), I-50121 Firenze, Italy
- Dipartimento
di Chimica “U. Schiff” (DICUS), Università degli Studi di Firenze, I-50019 Sesto Fiorentino (FI), Italy
| | - Michael R. Wasielewski
- Department
of Chemistry, Center for Molecular Quantum Transduction, and Institute
for Sustainability and Energy at Northwestern, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Robert Bittl
- Fachbereich
Physik, Berlin Joint EPR Lab, Freie Universität
Berlin, D-14195 Berlin, Germany
| | - Paolo Santini
- Dipartimento
di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN−Sezione
di Milano-Bicocca, gruppo collegato di Parma, 43124 Parma, Italy
- Consorzio
Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali
(INSTM), I-50121 Firenze, Italy
| | - Stefano Carretta
- Dipartimento
di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN−Sezione
di Milano-Bicocca, gruppo collegato di Parma, 43124 Parma, Italy
- Consorzio
Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali
(INSTM), I-50121 Firenze, Italy
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2
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Cordova DLM, Chua K, Kerr TA, Aoki T, Knez D, Skorupskii G, Lopez D, Ziller J, Fishman DA, Arguilla MQ. Atomically precise inorganic helices with a programmable irrational twist. NATURE MATERIALS 2024; 23:1347-1354. [PMID: 39060470 DOI: 10.1038/s41563-024-01963-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 07/02/2024] [Indexed: 07/28/2024]
Abstract
Helicity in solids often arises from the precise ordering of cooperative intra- and intermolecular interactions unique to natural, organic or molecular systems. This exclusivity limited the realization of helicity and its ensuing properties in dense inorganic solids. Here we report that Ga atoms in GaSeI, a representative III-VI-VII one-dimensional (1D) van der Waals crystal, manifest the rare Boerdijk-Coxeter helix motif. This motif is a non-repeating geometric pattern characterized by 1D face-sharing tetrahedra whose adjacent vertices are rotated by an irrational angle. Using InSeI and GaSeI, we show that the modularity of 1D van der Waals lattices accommodates the systematic twisting of a periodic tetrahelix with a 41 screw axis in InSeI to an infinitely extending Boerdijk-Coxeter helix in GaSeI. GaSeI crystals are non-centrosymmetric, optically active and exfoliable to a single chain. These results present a materials platform towards understanding the origin and physical manifestation of aperiodic helicity in low-dimensional solids.
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Affiliation(s)
| | - Kenneth Chua
- Department of Chemistry, University of California Irvine, Irvine, CA, USA
| | - Tyler A Kerr
- Department of Chemistry, University of California Irvine, Irvine, CA, USA
| | - Toshihiro Aoki
- Irvine Materials Research Institute, University of California Irvine, Irvine, CA, USA
| | - David Knez
- Department of Chemistry, University of California Irvine, Irvine, CA, USA
| | | | - Diana Lopez
- Department of Chemistry, University of California Irvine, Irvine, CA, USA
| | - Joseph Ziller
- Department of Chemistry, University of California Irvine, Irvine, CA, USA
| | - Dmitry A Fishman
- Department of Chemistry, University of California Irvine, Irvine, CA, USA
| | - Maxx Q Arguilla
- Department of Chemistry, University of California Irvine, Irvine, CA, USA.
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3
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Korytár R, van Ruitenbeek JM, Evers F. Spin conductances and magnetization production in chiral molecular junctions. J Chem Phys 2024; 161:094111. [PMID: 39234965 DOI: 10.1063/5.0226594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Accepted: 08/08/2024] [Indexed: 09/06/2024] Open
Abstract
Motivated by experimental reports on chirality induced spin selectivity, we investigate a minimal model that allows us to calculate the charge and spin conductances through helical molecules analytically. The spin-orbit interaction is assumed to be non-vanishing on the molecule and negligible in the reservoirs (leads). The band structure of the molecule features four helical modes with spin-momentum locking that are analogous of edge-currents in the quantum spin Hall effect. While charge is conserved and therefore the charge current is independent of where it is measured-reservoirs or molecule-our detailed calculations reveal that the spin currents in the left and right leads are equal in magnitudes but with opposite signs (in linear response). We predict that transport currents flowing through helical molecules are accompanied by a spin accumulation in the contact region with the same magnetization direction for source and drain. Furthermore, we predict that the spin-conductance can be extracted directly from measuring the (quasi-static) spin accumulation-rather than the spin current itself, which is very challenging to obtain experimentally.
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Affiliation(s)
- Richard Korytár
- Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116 Praha 2, Czech Republic
| | - Jan M van Ruitenbeek
- Huygens-Kamerlingh Onnes Laboratory, Leiden University, NL-2333CA Leiden, The Netherlands
| | - Ferdinand Evers
- Institute of Theoretical Physics, University of Regensburg, D-93050 Regensburg, Germany
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4
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Wang C, Liang ZR, Chen XF, Guo AM, Ji G, Sun QF, Yan Y. Transverse Spin Selectivity in Helical Nanofibers Prepared without Any Chiral Molecule. PHYSICAL REVIEW LETTERS 2024; 133:108001. [PMID: 39303270 DOI: 10.1103/physrevlett.133.108001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 05/14/2024] [Accepted: 07/29/2024] [Indexed: 09/22/2024]
Abstract
In the last decade, chirality-induced spin selectivity (CISS) has undergone intensive study. However, there remain several critical issues, such as the microscopic mechanism of CISS, especially transverse CISS where electrons are injected perpendicular to the helix axis of chiral molecules, quantitative agreement between experiments and theory, and at which level the molecular handedness is key to the CISS. Here, we address these issues by performing a combined experimental and theoretical study on conducting polyaniline helical nanofibers which are synthesized in the absence of any chiral species. Large spin polarization is measured in both left- and right-handed nanofibers for electrons injected perpendicular to their helix axis, and it will be reversed by switching the nanofiber handedness. We first develop a theoretical model to study this transverse CISS and quantitatively explain the experiment. Our results reveal that our theory provides a unifying scheme to interpret a number of CISS experiments, quantitative agreement between experiments and numerical calculations can be achieved by weak spin-orbit coupling, and the supramolecular handedness is sufficient for spin selectivity without any chiral species.
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Affiliation(s)
| | | | | | | | | | - Qing-Feng Sun
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
- Hefei National Laboratory, Hefei 230088, China
| | - Yong Yan
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
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5
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Liu T, Adhikari Y, Wang H, Jiang Y, Hua Z, Liu H, Schlottmann P, Gao H, Weiss PS, Yan B, Zhao J, Xiong P. Chirality-Induced Magnet-Free Spin Generation in a Semiconductor. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2406347. [PMID: 38926947 DOI: 10.1002/adma.202406347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 06/09/2024] [Indexed: 06/28/2024]
Abstract
Electrical generation and transduction of polarized electron spins in semiconductors (SCs) are of central interest in spintronics and quantum information science. While spin generation in SCs is frequently realized via electrical injection from a ferromagnet (FM), there are significant advantages in nonmagnetic pathways of creating spin polarization. One such pathway exploits the interplay of electron spin with chirality in electronic structures or real space. Here, utilizing chirality-induced spin selectivity (CISS), the efficient creation of spin accumulation in n-doped GaAs via electric current injection from a normal metal (Au) electrode through a self-assembled monolayer (SAM) of chiral molecules (α-helix l-polyalanine, AHPA-L), is demonstrated. The resulting spin polarization is detected as a Hanle effect in the n-GaAs, which is found to obey a distinct universal scaling with temperature and bias current consistent with chirality-induced spin accumulation. The experiment constitutes a definitive observation of CISS in a fully nonmagnetic device structure and demonstration of its ability to generate spin accumulation in a conventional SC. The results thus place key constraints on the physical mechanism of CISS and present a new scheme for magnet-free SC spintronics.
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Affiliation(s)
- Tianhan Liu
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Yuwaraj Adhikari
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Hailong Wang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
| | - Yiyang Jiang
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Zhenqi Hua
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Haoyang Liu
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Pedro Schlottmann
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Hanwei Gao
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Paul S Weiss
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- California NanoSystems Institute and Departments of Bioengineering and Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Binghai Yan
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Jianhua Zhao
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
| | - Peng Xiong
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
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6
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Li Z, Xiao Y, Jiang C, Hou B, Liu Y, Cui Y. Engineering spin-dependent catalysts: chiral covalent organic frameworks with tunable electroactivity for electrochemical oxygen evolution. Natl Sci Rev 2024; 11:nwae332. [PMID: 39398293 PMCID: PMC11467994 DOI: 10.1093/nsr/nwae332] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 09/08/2024] [Accepted: 09/14/2024] [Indexed: 10/15/2024] Open
Abstract
The chiral-induced spin selectivity (CISS) effect offers promising prospects for spintronics, yet designing chiral materials that enable efficient spin-polarized electron transport remains challenging. Here, we report the utility of covalent organic frameworks (COFs) in manipulating electron spin for spin-dependent catalysis via CISS. This enables us to design and synthesize three three-dimensional chiral COFs (CCOFs) with tunable electroactivity and spin-electron conductivity through imine condensations of enantiopure 1,1'-binaphthol-derived tetraaldehyde and tetraamines derived from 1,4-benzenediamine, pyrene, or tetrathiafulvalene skeletons. The CISS effect of CCOFs is verified by magnetic conductive atomic force microscopy. Compared with their achiral analogs, these CCOFs serve as efficient spin filters, reducing the overpotential of oxygen evolution and improving the Tafel slope. Particularly, the diarylamine-based CCOF showed a low overpotential of 430 mV (vs reversible hydrogen electrode) at 10 mA cm-2 with long-term stability comparable to the commercial RuO2. This enhanced spin-dependent OER activity stems from its excellent redox-activity, good electron conductivity and effective suppression effect on the formation of H2O2 byproducts.
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Affiliation(s)
- Ziping Li
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yueyuan Xiao
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chao Jiang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Bang Hou
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yan Liu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yong Cui
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
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7
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Sun S, Zhang Y, Shi X, Sun W, Felser C, Li W, Li G. From Charge to Spin: An In-Depth Exploration of Electron Transfer in Energy Electrocatalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2312524. [PMID: 38482969 DOI: 10.1002/adma.202312524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/24/2024] [Indexed: 05/01/2024]
Abstract
Catalytic materials play crucial roles in various energy-related processes, ranging from large-scale chemical production to advancements in renewable energy technologies. Despite a century of dedicated research, major enduring challenges associated with enhancing catalyst efficiency and durability, particularly in green energy-related electrochemical reactions, remain. Focusing only on either the crystal structure or electronic structure of a catalyst is deemed insufficient to break the linear scaling relationship (LSR), which is the golden rule for the design of advanced catalysts. The discourse in this review intricately outlines the essence of heterogeneous catalysis reactions by highlighting the vital roles played by electron properties. The physical and electrochemical properties of electron charge and spin that govern catalysis efficiencies are analyzed. Emphasis is placed on the pronounced influence of external fields in perturbing the LSR, underscoring the vital role that electron spin plays in advancing high-performance catalyst design. The review culminates by proffering insights into the potential applications of spin catalysis, concluding with a discussion of extant challenges and inherent limitations.
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Affiliation(s)
- Shubin Sun
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Key Laboratory of Green Chemistry-Synthesis Technology of Zhejiang Province, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yudi Zhang
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- College of Material Sciences and Opto-Electronic Technology, University of Chinese Academy of Sciences, 19 A Yuquan Rd, Shijingshan District, Beijing, 100049, China
| | - Xin Shi
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- School of Materials Science and Chemical Engineering, Ningbo University, 818 A Fenghua Rd, Jiangbei District, Ningbo, 315211, China
| | - Wen Sun
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- College of Material Sciences and Opto-Electronic Technology, University of Chinese Academy of Sciences, 19 A Yuquan Rd, Shijingshan District, Beijing, 100049, China
| | - Claudia Felser
- Topological Quantum Chemistry, Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187, Dresden, Germany
| | - Wei Li
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Chinese Academy of Sciences, Ningbo Institute of Material Technology and Engineering, Ningbo, 315201, China
| | - Guowei Li
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- College of Material Sciences and Opto-Electronic Technology, University of Chinese Academy of Sciences, 19 A Yuquan Rd, Shijingshan District, Beijing, 100049, China
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8
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Chen C, Tran J, McFadden A, Simmonds R, Saito K, Chu ED, Morales D, Suezaki V, Hou Y, Aumentado J, Lee PA, Moodera JS, Wei P. Signatures of a spin-active interface and a locally enhanced Zeeman field in a superconductor-chiral material heterostructure. SCIENCE ADVANCES 2024; 10:eado4875. [PMID: 39178249 PMCID: PMC11343014 DOI: 10.1126/sciadv.ado4875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 07/19/2024] [Indexed: 08/25/2024]
Abstract
A localized Zeeman field, intensified at heterostructure interfaces, could play a crucial role in a broad area including spintronics and unconventional superconductors. Conventionally, the generation of a local Zeeman field is achieved through magnetic exchange coupling with a magnetic material. However, magnetic elements often introduce defects, which could weaken or destroy superconductivity. Alternatively, the coupling between a superconductor with strong spin-orbit coupling and a nonmagnetic chiral material could serve as a promising approach to generate a spin-active interface. Here, we leverage an interface superconductor, namely, induced superconductivity in noble metal surface states, to probe the spin-active interface. Our results unveil an enhanced interface Zeeman field, which selectively closes the surface superconducting gap while preserving the bulk superconducting pairing. The chiral material, i.e., trigonal tellurium, also induces Andreev bound states (ABS) exhibiting spin polarization. The field dependence of ABS manifests a substantially enhanced interface Landé g-factor (geff ~ 12), thereby corroborating the enhanced interface Zeeman energy.
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Affiliation(s)
- Cliff Chen
- Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
| | - Jason Tran
- Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
| | - Anthony McFadden
- National Institute of Standards and Technology, Boulder, CO 80305, USA
| | - Raymond Simmonds
- National Institute of Standards and Technology, Boulder, CO 80305, USA
| | - Keisuke Saito
- Rigaku Americas, a Division of Rigaku Americas Holding, The Woodlands, TX 77381, USA
| | - En-De Chu
- Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
| | - Daniel Morales
- Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
| | - Varrick Suezaki
- Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
| | - Yasen Hou
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Francis Bitter Magnet Laboratory, and Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Joe Aumentado
- National Institute of Standards and Technology, Boulder, CO 80305, USA
| | - Patrick A. Lee
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jagadeesh S. Moodera
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Francis Bitter Magnet Laboratory, and Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Peng Wei
- Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
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9
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Dold K, Cordova DLM, Singsen S, Nguyen JQ, Milligan GM, Marracci M, Yao ZF, Ziller JW, Fishman DA, Lee EMY, Arguilla MQ. GaSI: A Wide-Gap Non-centrosymmetric Helical Crystal. J Am Chem Soc 2024; 146:22881-22886. [PMID: 39038204 PMCID: PMC11345776 DOI: 10.1021/jacs.4c06487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 07/15/2024] [Accepted: 07/17/2024] [Indexed: 07/24/2024]
Abstract
The complex non-centrosymmetric and chiral nature of helical structures endow materials that possess such motifs with unusual properties. However, despite their ubiquity in biological and organic systems, there is a severe lack of inorganic crystals that display helicity in extended lattices, where these unusual properties are expected to be most pronounced. Here, we report a new inorganic helical structure, gallium sulfur iodide (GaSI), within the exfoliable class of III-VI-VII (1:1:1) one-dimensional (1D) van der Waals (vdW) crystals. Through detailed structural analyses, including single-crystal X-ray diffraction, electron microscopy, and density functional theory (DFT), we elucidate the apparent noncrystallographic screw axis and the first example of an atomic scale helical structure bearing a "squircular" cross-section in GaSI. Crystallizing in the non-centrosymmetric P4̅ space group, we found that GaSI crystals exhibit pronounced second-harmonic generation. From diffuse reflectance spectroscopy, GaSI displays a sizeable bandgap of 3.69 eV, owing tostrong covalent interactions arising from the smaller sulfur atoms within the helix core. These results position GaSI as a promising exfoliable nonlinear optical material across a broad optical window.
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Affiliation(s)
- Kaitlyn
G. Dold
- Department
of Chemistry, University of California, Irvine, California 92697, United States
| | | | - Sirisak Singsen
- Department
of Materials Science and Engineering, University
of California, Irvine, California 92697, United States
| | - Joseph Q. Nguyen
- Department
of Chemistry, University of California, Irvine, California 92697, United States
| | - Griffin M. Milligan
- Department
of Chemistry, University of California, Irvine, California 92697, United States
| | - Marcus Marracci
- Department
of Chemistry, University of California, Irvine, California 92697, United States
| | - Ze-Fan Yao
- Department
of Chemical and Biomolecular Engineering, University of California, Irvine, California 92697, United States
| | - Joseph W. Ziller
- Department
of Chemistry, University of California, Irvine, California 92697, United States
| | - Dmitry A. Fishman
- Department
of Chemistry, University of California, Irvine, California 92697, United States
| | - Elizabeth M. Y. Lee
- Department
of Materials Science and Engineering, University
of California, Irvine, California 92697, United States
- Department
of Chemical and Biomolecular Engineering, University of California, Irvine, California 92697, United States
| | - Maxx Q. Arguilla
- Department
of Chemistry, University of California, Irvine, California 92697, United States
- Department
of Chemical and Biomolecular Engineering, University of California, Irvine, California 92697, United States
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10
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Nguyen TNH, Salvan G, Hellwig O, Paltiel Y, Baczewski LT, Tegenkamp C. The mechanism of the molecular CISS effect in chiral nano-junctions. Chem Sci 2024; 15:d4sc04435e. [PMID: 39246376 PMCID: PMC11378035 DOI: 10.1039/d4sc04435e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Accepted: 08/10/2024] [Indexed: 09/10/2024] Open
Abstract
The chirality induced spin selectivity (CISS) effect has been up to now measured in a wide variety of systems but its exact mechanism is still under debate. Whether the spin polarization occurs at an interface layer or builds up in the helical molecule is yet not clear. Here we have investigated the current transmission through helical polyalanine molecules as a part of a tunnel junction realized with a scanning tunneling microscope. Depending on whether the molecules were chemisorbed directly on the magnetic Au/Co/Au substrate or at the STM Au-tip, the magnetizations of the Co layer had been oriented in the opposite direction in order to preserve the symmetry of the IV-curves. This is the first time that the CISS effect is demonstrated for a tunneling junction without a direct interface between the helical molecules and the magnetic substrate. Our results can be explained by a spin-polarized or spin-selective interface effect, induced and defined by the helicity and electric dipole orientation of the molecule at the interface. In this sense, the helical molecule does not act as a simple spin-filter or spin-polarizer and the CISS effect is not limited to spinterfaces.
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Affiliation(s)
- Thi Ngoc Ha Nguyen
- Solid Surface Analysis, Institute of Physics, Chemnitz University of Technology 09126 Chemnitz Germany
| | - Georgeta Salvan
- Semiconductor Physics, Institute of Physics, Chemnitz University of Technology 09126 Chemnitz Germany
| | - Olav Hellwig
- Functional Magnetic Materials, Institute of Physics, Chemnitz University of Technology 09126 Chemnitz Germany
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf 01328 Dresden Germany
| | - Yossi Paltiel
- Department of Applied Physics, Hebrew University of Jerusalem 91904 Jerusalem Israel
- Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem 91904 Jerusalem Israel
| | | | - Christoph Tegenkamp
- Solid Surface Analysis, Institute of Physics, Chemnitz University of Technology 09126 Chemnitz Germany
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11
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Wan Z, Qiu G, Ren H, Qian Q, Li Y, Xu D, Zhou J, Zhou J, Zhou B, Wang L, Yang TH, Sofer Z, Huang Y, Wang KL, Duan X. Unconventional superconductivity in chiral molecule-TaS 2 hybrid superlattices. Nature 2024; 632:69-74. [PMID: 38926586 DOI: 10.1038/s41586-024-07625-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 05/29/2024] [Indexed: 06/28/2024]
Abstract
Chiral superconductors, a unique class of unconventional superconductors in which the complex superconducting order parameter winds clockwise or anticlockwise in the momentum space1, represent a topologically non-trivial system with intrinsic time-reversal symmetry breaking (TRSB) and direct implications for topological quantum computing2,3. Intrinsic chiral superconductors are extremely rare, with only a few arguable examples, including UTe2, UPt3 and Sr2RuO4 (refs. 4-7). It has been suggested that chiral superconductivity may exist in non-centrosymmetric superconductors8,9, although such non-centrosymmetry is uncommon in typical solid-state superconductors. Alternatively, chiral molecules with neither mirror nor inversion symmetry have been widely investigated. We suggest that an incorporation of chiral molecules into conventional superconductor lattices could introduce non-centrosymmetry and help realize chiral superconductivity10. Here we explore unconventional superconductivity in chiral molecule intercalated TaS2 hybrid superlattices. Our studies reveal an exceptionally large in-plane upper critical field Bc2,|| well beyond the Pauli paramagnetic limit, a robust π-phase shift in Little-Parks measurements and a field-free superconducting diode effect (SDE). These experimental signatures of unconventional superconductivity suggest that the intriguing interplay between crystalline atomic layers and the self-assembled chiral molecular layers may lead to exotic topological materials. Our study highlights that the hybrid superlattices could lay a versatile path to artificial quantum materials by combining a vast library of layered crystals of rich physical properties with the nearly infinite variations of molecules of designable structural motifs and functional groups11.
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Affiliation(s)
- Zhong Wan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA
| | - Gang Qiu
- Department of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, CA, USA
| | - Huaying Ren
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA
| | - Qi Qian
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA
| | - Yaochen Li
- Department of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, CA, USA
| | - Dong Xu
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, USA
| | - Jingyuan Zhou
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA
| | - Jingxuan Zhou
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, USA
| | - Boxuan Zhou
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, USA
| | - Laiyuan Wang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA
| | - Ting-Hsun Yang
- Department of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, CA, USA
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Prague, Czech Republic
| | - Yu Huang
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, USA.
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA, USA.
| | - Kang L Wang
- Department of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, CA, USA.
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA, USA.
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, CA, USA.
| | - Xiangfeng Duan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA.
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA, USA.
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12
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Das TK, Naaman R, Fransson J. Insights into the Mechanism of Chiral-Induced Spin Selectivity: The Effect of Magnetic Field Direction and Temperature. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2313708. [PMID: 38766930 DOI: 10.1002/adma.202313708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 04/15/2024] [Indexed: 05/22/2024]
Abstract
Chiral oligopeptide monolayers are adsorbed on a ferromagnetic surface and their magnetoresistance is measured as a function of the angle between the magnetization of the ferromagnet and the surface normal. These measurements are conducted as a function of temperature for both enantiomers. The angle dependence is found to follow a changing trend with a period of 360°. Quantum simulations reveal that the angular distribution can be obtained only if the monolayer has significant effective spin orbit coupling (SOC), that includes contribution from the vibrations. The model shows that SOC only in the leads cannot reproduce the observed angular dependence. The simulation can reproduce the experiments if it included electron-phonon interactions and dissipation.
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Affiliation(s)
- Tapan Kumar Das
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Ron Naaman
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Jonas Fransson
- Department of Physics and Astronomy, Uppsala University, Uppsala, 75236, Sweden
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13
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Wang S, Kuang H, Li W, Wang Y, Luo H, Li C, Ge H, Wang Q, Jia B. Enhanced Tunability of Dual-Band Chiral Metasurface in the Mid-Infrared Range via Slotted Nanocircuit Design. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:979. [PMID: 38869605 PMCID: PMC11173487 DOI: 10.3390/nano14110979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 05/31/2024] [Accepted: 06/02/2024] [Indexed: 06/14/2024]
Abstract
Multi-band circular dichroism (CD) response and tunability on the chiral metasurface are crucial for this device's applications in sensing and detection. This work proposes a dual-band CD Au-CaF2-Au dimer elliptical metasurface absorber, where chiroptical sensing is realized by breaking the geometric symmetry between two ellipses. The proposed metasurface can achieve high CD values of 0.8 and -0.74 for the dual-band within the 3-5 μm region, and the CD values can be manipulated by independently adjusting the geometric parameters of the metasurface. Furthermore, a slotted nanocircuit is introduced onto the metasurface to enhance its tunability by manipulating the geometry parameter in the design process, and the related mechanism is explained using an equivalent circuit model. The simulation of the sensing model revealed that the slotted nanocircuit enhances the sensor's tunability and significantly improves its bandwidth and sensitivity, achieving peak enhancements at approximately 753 nm and 1311 nm/RIU, respectively. Due to the strong dual-band positive (and negative) responses of the CD values, flexible wavelength tunability, and nonlinear sensitivity enhancement, this design provides a new approach for the development and application of mid-infrared chiroptical devices.
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Affiliation(s)
- Shengyi Wang
- School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.W.); (H.K.); (W.L.); (H.L.); (C.L.); (H.G.)
| | - Hanzhuo Kuang
- School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.W.); (H.K.); (W.L.); (H.L.); (C.L.); (H.G.)
| | - Wenjie Li
- School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.W.); (H.K.); (W.L.); (H.L.); (C.L.); (H.G.)
| | - Yanni Wang
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan 430060, China;
| | - Hao Luo
- School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.W.); (H.K.); (W.L.); (H.L.); (C.L.); (H.G.)
| | - Chengjun Li
- School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.W.); (H.K.); (W.L.); (H.L.); (C.L.); (H.G.)
| | - Hua Ge
- School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.W.); (H.K.); (W.L.); (H.L.); (C.L.); (H.G.)
| | - Qiu Wang
- School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.W.); (H.K.); (W.L.); (H.L.); (C.L.); (H.G.)
| | - Bowen Jia
- School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.W.); (H.K.); (W.L.); (H.L.); (C.L.); (H.G.)
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14
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Chen S, Wu R, Fu HH. Persistent Chirality-Induced Spin-Selectivity Effect in Circular Helix Molecules. NANO LETTERS 2024; 24:6210-6217. [PMID: 38709107 DOI: 10.1021/acs.nanolett.4c00383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
The spin-orbit coupling (SOC), the dynamics of the nonequilibrium transport process, and the breaking of time-reversal and space-inversion symmetries have been regarded as key factors for the emergence of chirality-induced spin selectivity (CISS) and chirality-dependent spin currents in helix molecules. In this work, we demonstrated the generation of persistent CISS currents in various circular single-stranded DNAs and 310-helix proteins for the first time, regardless of whether an external magnetic flux is applied or not. This new CISS effect presents only in equilibrium transport processes, distinct from the traditional CISS observed in nonequilibrium transport processes and linear helix molecules; we term it as the PCISS effect. Notably, PCISS manifests irrespective of whether the SOC is chirality-driven or stems from heavy-metal substrates, making it an efficient way to generate chirality-locked pure spin currents. Our research establishes a novel paradigm for examining the underlying physics of the CISS effect.
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Affiliation(s)
- Song Chen
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Ruqian Wu
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, United States
| | - Hua-Hua Fu
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
- Institute for Quantum Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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15
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Brinkman SS, Tan XL, Brekke B, Mathisen AC, Finnseth Ø, Schenk RJ, Hagiwara K, Huang MJ, Buck J, Kalläne M, Hoesch M, Rossnagel K, Ou Yang KH, Lin MT, Shu GJ, Chen YJ, Tusche C, Bentmann H. Chirality-Driven Orbital Angular Momentum and Circular Dichroism in CoSi. PHYSICAL REVIEW LETTERS 2024; 132:196402. [PMID: 38804933 DOI: 10.1103/physrevlett.132.196402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 03/20/2024] [Indexed: 05/29/2024]
Abstract
Chiral crystals and molecules were recently predicted to form an intriguing platform for unconventional orbital physics. Here, we report the observation of chirality-driven orbital textures in the bulk electronic structure of CoSi, a prototype member of the cubic B20 family of chiral crystals. Using circular dichroism in soft x-ray angle-resolved photoemission, we demonstrate the formation of a bulk orbital-angular-momentum texture and monopolelike orbital-momentum locking that depends on crystal handedness. We introduce the intrinsic chiral circular dichroism, icCD, as a differential photoemission observable and a natural probe of chiral electron states. Our findings render chiral crystals promising for spin-orbitronics applications.
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Affiliation(s)
- Stefanie Suzanne Brinkman
- Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Xin Liang Tan
- Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
- Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, Jülich 52425, Germany
- Faculty of Physics, University of Duisburg-Essen, Duisburg 47057, Germany
| | - Bjørnulf Brekke
- Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Anders Christian Mathisen
- Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Øyvind Finnseth
- Department of Materials Science and Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Richard Justin Schenk
- Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Kenta Hagiwara
- Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, Jülich 52425, Germany
- Faculty of Physics, University of Duisburg-Essen, Duisburg 47057, Germany
| | - Meng-Jie Huang
- Ruprecht Haensel Laboratory, Kiel University, 24098 Kiel, Germany
- Ruprecht Haensel Laboratory, DESY, 22607 Hamburg, Germany
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Jens Buck
- Ruprecht Haensel Laboratory, Kiel University, 24098 Kiel, Germany
- Ruprecht Haensel Laboratory, DESY, 22607 Hamburg, Germany
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - Matthias Kalläne
- Ruprecht Haensel Laboratory, Kiel University, 24098 Kiel, Germany
- Ruprecht Haensel Laboratory, DESY, 22607 Hamburg, Germany
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - Moritz Hoesch
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Kai Rossnagel
- Ruprecht Haensel Laboratory, Kiel University, 24098 Kiel, Germany
- Ruprecht Haensel Laboratory, DESY, 22607 Hamburg, Germany
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - Kui-Hon Ou Yang
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Minn-Tsong Lin
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Guo-Jiun Shu
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Ying-Jiun Chen
- Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, Jülich 52425, Germany
- Faculty of Physics, University of Duisburg-Essen, Duisburg 47057, Germany
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Christian Tusche
- Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, Jülich 52425, Germany
- Faculty of Physics, University of Duisburg-Essen, Duisburg 47057, Germany
| | - Hendrik Bentmann
- Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
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16
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Krieger JA, Stolz S, Robredo I, Manna K, McFarlane EC, Date M, Pal B, Yang J, B Guedes E, Dil JH, Polley CM, Leandersson M, Shekhar C, Borrmann H, Yang Q, Lin M, Strocov VN, Caputo M, Watson MD, Kim TK, Cacho C, Mazzola F, Fujii J, Vobornik I, Parkin SSP, Bradlyn B, Felser C, Vergniory MG, Schröter NBM. Weyl spin-momentum locking in a chiral topological semimetal. Nat Commun 2024; 15:3720. [PMID: 38697958 PMCID: PMC11066003 DOI: 10.1038/s41467-024-47976-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 04/17/2024] [Indexed: 05/05/2024] Open
Abstract
Spin-orbit coupling in noncentrosymmetric crystals leads to spin-momentum locking - a directional relationship between an electron's spin angular momentum and its linear momentum. Isotropic orthogonal Rashba spin-momentum locking has been studied for decades, while its counterpart, isotropic parallel Weyl spin-momentum locking has remained elusive in experiments. Theory predicts that Weyl spin-momentum locking can only be realized in structurally chiral cubic crystals in the vicinity of Kramers-Weyl or multifold fermions. Here, we use spin- and angle-resolved photoemission spectroscopy to evidence Weyl spin-momentum locking of multifold fermions in the chiral topological semimetal PtGa. We find that the electron spin of the Fermi arc surface states is orthogonal to their Fermi surface contour for momenta close to the projection of the bulk multifold fermion at the Γ point, which is consistent with Weyl spin-momentum locking of the latter. The direct measurement of the bulk spin texture of the multifold fermion at the R point also displays Weyl spin-momentum locking. The discovery of Weyl spin-momentum locking may lead to energy-efficient memory devices and Josephson diodes based on chiral topological semimetals.
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Affiliation(s)
- Jonas A Krieger
- Max Planck Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland
| | - Samuel Stolz
- Department of Physics, University of California, Berkeley, CA, USA
- nanotech@surfaces Laboratory, Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600, Dübendorf, Switzerland
| | - Iñigo Robredo
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
- Donostia International Physics Center, 20018, Donostia - San Sebastian, Spain
| | - Kaustuv Manna
- Indian Institute of Technology-Delhi, Hauz Khas, New Delhi, 110 016, India
| | - Emily C McFarlane
- Max Planck Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany
| | - Mihir Date
- Max Planck Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany
| | - Banabir Pal
- Max Planck Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany
| | - Jiabao Yang
- Max Planck Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany
| | - Eduardo B Guedes
- Photon Science Division, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
- Institut de Physique, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - J Hugo Dil
- Photon Science Division, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
- Institut de Physique, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Craig M Polley
- MAX IV Laboratory, Lund University, Fotongatan 2, 22484, Lund, Sweden
| | - Mats Leandersson
- MAX IV Laboratory, Lund University, Fotongatan 2, 22484, Lund, Sweden
| | - Chandra Shekhar
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Horst Borrmann
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Qun Yang
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Mao Lin
- Department of Physics, University of Illinois, Urbana-Champaign, USA
| | - Vladimir N Strocov
- Photon Science Division, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
| | - Marco Caputo
- Photon Science Division, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
| | - Matthew D Watson
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, OX11 0DE, UK
| | - Timur K Kim
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, OX11 0DE, UK
| | - Cephise Cacho
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, OX11 0DE, UK
| | - Federico Mazzola
- Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, Trieste, I-34149, Italy
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, 30172, Venice, Italy
| | - Jun Fujii
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149, Trieste, Italy
| | - Ivana Vobornik
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149, Trieste, Italy
| | - Stuart S P Parkin
- Max Planck Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany
| | - Barry Bradlyn
- Department of Physics, University of Illinois, Urbana-Champaign, USA
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Maia G Vergniory
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
- Donostia International Physics Center, 20018, Donostia - San Sebastian, Spain
| | - Niels B M Schröter
- Max Planck Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany.
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17
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Zhao D, Zhao Y, Xu T, He X, Hu S, Ayers PW, Liu S. Chiral Jahn-Teller Distortion in Quasi-Planar Boron Clusters. Molecules 2024; 29:1624. [PMID: 38611903 PMCID: PMC11013085 DOI: 10.3390/molecules29071624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 04/03/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024] Open
Abstract
In this work, we have observed that some chiral boron clusters (B16-, B20-, B24-, and B28-) can simultaneously have helical molecular orbitals and helical spin densities; these seem to be the first compounds discovered to have this intriguing property. We show that chiral Jahn-Teller distortion of quasi-planar boron clusters drives the formation of the helical molecular spin densities in these clusters and show that elongation/enhancement in helical molecular orbitals can be achieved by simply adding more building blocks via a linker. Aromaticity of these boron clusters is discussed. Chiral boron clusters may find potential applications in spintronics, such as molecular magnets.
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Affiliation(s)
- Dongbo Zhao
- Institute of Biomedical Research, Yunnan University, Kunming 650500, China
| | - Yilin Zhao
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON L8S 4M1, Canada
| | - Tianlv Xu
- College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Xin He
- Qingdao Institute for Theoretical and Computational Sciences, Shandong University, Qingdao 266237, China
| | - Shankai Hu
- Institute of Biomedical Research, Yunnan University, Kunming 650500, China
| | - Paul W. Ayers
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON L8S 4M1, Canada
| | - Shubin Liu
- Research Computing Center, University of North Carolina, Chapel Hill, NC 27599-3420, USA
- Department of Chemistry, University of North Carolina, Chapel Hill, NC 27599-3290, USA
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18
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Bloom BP, Paltiel Y, Naaman R, Waldeck DH. Chiral Induced Spin Selectivity. Chem Rev 2024; 124:1950-1991. [PMID: 38364021 PMCID: PMC10906005 DOI: 10.1021/acs.chemrev.3c00661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 01/16/2024] [Accepted: 01/23/2024] [Indexed: 02/18/2024]
Abstract
Since the initial landmark study on the chiral induced spin selectivity (CISS) effect in 1999, considerable experimental and theoretical efforts have been made to understand the physical underpinnings and mechanistic features of this interesting phenomenon. As first formulated, the CISS effect refers to the innate ability of chiral materials to act as spin filters for electron transport; however, more recent experiments demonstrate that displacement currents arising from charge polarization of chiral molecules lead to spin polarization without the need for net charge flow. With its identification of a fundamental connection between chiral symmetry and electron spin in molecules and materials, CISS promises profound and ubiquitous implications for existing technologies and new approaches to answering age old questions, such as the homochiral nature of life. This review begins with a discussion of the different methods for measuring CISS and then provides a comprehensive overview of molecules and materials known to exhibit CISS-based phenomena before proceeding to identify structure-property relations and to delineate the leading theoretical models for the CISS effect. Next, it identifies some implications of CISS in physics, chemistry, and biology. The discussion ends with a critical assessment of the CISS field and some comments on its future outlook.
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Affiliation(s)
- Brian P. Bloom
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Yossi Paltiel
- Applied
Physics Department and Center for Nano-Science and Nano-Technology, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Ron Naaman
- Department
of Chemical and Biological Physics, Weizmann
Institute, Rehovot 76100, Israel
| | - David H. Waldeck
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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19
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Tirion SH, van Wees BJ. Mechanism for Electrostatically Generated Magnetoresistance in Chiral Systems without Spin-Dependent Transport. ACS NANO 2024; 18:6028-6037. [PMID: 38353652 PMCID: PMC10906072 DOI: 10.1021/acsnano.3c12925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/28/2024]
Abstract
Significant attention has been drawn to electronic transport in chiral materials coupled to ferromagnets in the chirality-induced spin selectivity (CISS) effect. A large magnetoresistance (MR) is usually observed, which is widely interpreted to originate from spin (dependent) transport. However, there are severe discrepancies between the experimental results and the theoretical interpretations, most notably the apparent failure of the Onsager reciprocity relations in the linear response regime. We provide an alternative mechanism for the two terminal MR in chiral systems coupled to a ferromagnet. For this, we point out that it was observed experimentally that the electrostatic contact potential of chiral materials on a ferromagnet depends on the magnetization direction and chirality. The mechanism that we provide causes the transport barrier to be modified by the magnetization direction, already in equilibrium, in the absence of a bias current. This strongly alters the charge transport through and over the barrier, not requiring spin transport. This provides a mechanism that allows the linear response resistance to be sensitive to the magnetization direction and also explains the failure of the Onsager reciprocity relations. We propose experimental configurations to confirm our alternative mechanism for MR.
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Affiliation(s)
- Sytze H. Tirion
- Zernike Institute for Advanced
Materials, University of Groningen, NL-9747AG Groningen, The Netherlands
| | - Bart J. van Wees
- Zernike Institute for Advanced
Materials, University of Groningen, NL-9747AG Groningen, The Netherlands
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20
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Zhao Y, Galiautdinov A, Tie J. The N-Oscillator Born-Kuhn Model: An In-Depth Analysis of Chiro-Optical Properties in Complex Chiral Systems. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:270. [PMID: 38334541 PMCID: PMC10856515 DOI: 10.3390/nano14030270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 02/10/2024]
Abstract
A comprehensive theory is developed for the chiral optical response of two configurations of the N-oscillator Born-Kuhn model (NOBK): the helically stacked and the corner stacked models. In the helical NOBK model, there is always a chiral response regardless of the value of N, whereas in the corner NOBK, only configurations with even N demonstrate a chiral response. Generally, the magnitudes of optical rotatory dispersion (ORD) and circular dichroism (CD) increase with N when the parameters of each oscillator are fixed. In cases of weak coupling, the spectral shapes of ORD and CD remain invariant, while strong coupling significantly alters the spectral shapes. For large damping, the spectral amplitude becomes smaller, and the spectral features become broader. In the presence of small damping, strong coupling introduces degeneracy in the coupled oscillator system, leading to multiple spectral features in both ORD and CD across the entire spectral region. This simple model can not only help in the design of tunable chiral metamaterials but also enhance our understanding of chiro-optical responses in structures with different configurations.
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Affiliation(s)
- Yiping Zhao
- Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602, USA;
| | - Andrei Galiautdinov
- Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602, USA;
| | - Jingzhi Tie
- Department of Mathematics, The University of Georgia, Athens, GA 30602, USA;
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21
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Wang X, Yi C, Felser C. Chiral Quantum Materials: When Chemistry Meets Physics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2308746. [PMID: 38126622 DOI: 10.1002/adma.202308746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 12/01/2023] [Indexed: 12/23/2023]
Abstract
Chirality is a fundamental property of nature with relevance in biochemistry and physics, particularly in the field of catalysis. Understanding the mechanisms underlying chirality transfer is crucial for advancing the knowledge of chiral-related catalysis. Chiral quantum materials with intriguing chirality-dependent electronic properties, such as spin-orbital coupling (SOC) and exotic spin/orbital angular momentum (SAM/OAM), open novel avenues for linking solid-state topologies with chiral catalysis. In this review, the growth of topological homochiral crystals (THCs) is described, and their applications in heterogeneous catalysis, including hydrogen evolution reaction (HER), oxygen electrocatalysis, and asymmetric catalysis are summarized. A possible link between chirality-dependent electronic properties and heterogeneous catalysis is discussed. Finally, existing challenges in this field are highlighted, and a brief outlook on the impact of THCs on the overarching chemical-physical research is presented.
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Affiliation(s)
- Xia Wang
- Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany
| | - Changjiang Yi
- Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany
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22
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Chen S, Fu HH. Spin-Dependent Destructive and Constructive Quantum Interference Associated with Chirality-Induced Spin Selectivity in Single Circular Helix Molecules. J Phys Chem Lett 2023:11076-11083. [PMID: 38048754 DOI: 10.1021/acs.jpclett.3c02648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
Chirality-induced spin selectivity (CISS) effect in straight helical molecules has received intense studies in past decade; however, the CISS effect in circular helical molecules (CHMs) has still rarely been explored. Here, we have constructed single CHMs having chirality-induced spin-orbit coupling (SOC) and connected by two nonmagnetic leads and successfully gained the required conditions for CISS effect occurring in CHMs for the first time. Our results uncover that only when the CHMs form a closed loop and when the lattice positions are coupled asymmetrically with both leads does the CISS effect occur. More importantly, the CISS-associated spin-dependent destructive and constructive quantum interference (QI) together with their phase transition appears in CHMs. The combination of CISS effect and spin-dependent QI phenomena opens up a new door to understand the underlying physics of the CISS effect in helical molecules.
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Affiliation(s)
- Song Chen
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China
| | - Hua-Hua Fu
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China
- Institute for Quantum Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China
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23
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Fathizadeh S. Phonon-assisted nearly pure spin current in DNA molecular chains: a multifractal analysis. Sci Rep 2023; 13:21281. [PMID: 38042962 PMCID: PMC10693578 DOI: 10.1038/s41598-023-48644-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 11/28/2023] [Indexed: 12/04/2023] Open
Abstract
Motivated by the development of molecular spintronics, we studied the phonon-assisted spin transport along a DNA chain in the presence of environmental-induced dephasing using multifractal analysis. The results demonstrate that a nearly pure spin current is generated in the presence of the voltage gate. The pure spin current is enhanced by increasing thermal effects. The vibration modes due to the thermal phonon bath assist in generating the spin current, so the spin state is more delocalized in strong electron-phonon coupling. The phonon chirality can translate to the electron spin to create a nontrivial spin texture, including spin currents. The spin states become more extended by increasing the phonon temperature. On the other hand, the spin states are less localized in longer chains as the spin selectivity is higher in longer chains than in short ones. Therefore, we can engineer a molecular spintronic device by controlling phonon effects on the storage and transport of binary digits.
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Affiliation(s)
- S Fathizadeh
- Department of Physics, Urmia University of Technology, Urmia, Iran.
- Research Institute for Applied Physics and Astronomy, Tabriz University, Tabriz, Iran.
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24
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Yang Q, Xiao J, Robredo I, Vergniory MG, Yan B, Felser C. Monopole-like orbital-momentum locking and the induced orbital transport in topological chiral semimetals. Proc Natl Acad Sci U S A 2023; 120:e2305541120. [PMID: 37983495 PMCID: PMC10691347 DOI: 10.1073/pnas.2305541120] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 10/20/2023] [Indexed: 11/22/2023] Open
Abstract
The interplay between chirality and topology nurtures many exotic electronic properties. For instance, topological chiral semimetals display multifold chiral fermions that manifest nontrivial topological charge and spin texture. They are an ideal playground for exploring chirality-driven exotic physical phenomena. In this work, we reveal a monopole-like orbital-momentum locking texture on the three-dimensional Fermi surfaces of topological chiral semimetals with B20 structures (e.g., RhSi and PdGa). This orbital texture enables a large orbital Hall effect (OHE) and a giant orbital magnetoelectric (OME) effect in the presence of current flow. Different enantiomers exhibit the same OHE which can be converted to the spin Hall effect by spin-orbit coupling in materials. In contrast, the OME effect is chirality-dependent and much larger than its spin counterpart. Our work reveals the crucial role of orbital texture for understanding OHE and OME effects in topological chiral semimetals and paves the path for applications in orbitronics, spintronics, and enantiomer recognition.
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Affiliation(s)
- Qun Yang
- Max Planck Institute for Chemical Physics of Solids, Dresden01187, Germany
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot7610001, Israel
| | - Jiewen Xiao
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot7610001, Israel
| | - Iñigo Robredo
- Max Planck Institute for Chemical Physics of Solids, Dresden01187, Germany
- Donostia International Physics Center, Donostia-San Sebastian20018, Spain
| | - Maia G. Vergniory
- Max Planck Institute for Chemical Physics of Solids, Dresden01187, Germany
- Donostia International Physics Center, Donostia-San Sebastian20018, Spain
| | - Binghai Yan
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot7610001, Israel
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids, Dresden01187, Germany
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25
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Ren M, Cheng F, Zhao Y, Gu M, Cheng Q, Yan B, Liu Q, Ma X, Xue Q, Song CL. Chiral Charge Density Wave and Backscattering-Immune Orbital Texture in Monolayer 1 T-TiTe 2. NANO LETTERS 2023; 23:10081-10088. [PMID: 37903418 DOI: 10.1021/acs.nanolett.3c03692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Abstract
Nontrivial electronic states are attracting intense attention in low-dimensional physics. Though chirality has been identified in charge states with a scalar order parameter, its intertwining with charge density waves (CDW), film thickness, and the impact on the electronic behaviors remain less well understood. Here, using scanning tunneling microscopy, we report a 2 × 2 chiral CDW as well as a strong suppression of the Te-5p hole-band backscattering in monolayer 1T-TiTe2. These exotic characters vanish in bilayer TiTe2 in a non-CDW state. Theoretical calculations prove that chirality comes from a helical stacking of the triple-q CDW components and, therefore, can persist at the two-dimensional limit. Furthermore, the chirality renders the Te-5p bands with an unconventional orbital texture that prohibits electron backscattering. Our study establishes TiTe2 as a promising playground for manipulating the chiral ground states at the monolayer limit and provides a novel path to engineer electronic properties from an orbital degree.
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Affiliation(s)
- Mingqiang Ren
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
- Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Fangjun Cheng
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - Yufei Zhao
- Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Mingqiang Gu
- Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Qiangjun Cheng
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - Binghai Yan
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Qihang Liu
- Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xucun Ma
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
- Frontier Science Center for Quantum Information, Beijing 100084, China
| | - Qikun Xue
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
- Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
- Frontier Science Center for Quantum Information, Beijing 100084, China
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China
| | - Can-Li Song
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
- Frontier Science Center for Quantum Information, Beijing 100084, China
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26
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Liu T, Weiss PS. Spin Polarization in Transport Studies of Chirality-Induced Spin Selectivity. ACS NANO 2023; 17:19502-19507. [PMID: 37793070 DOI: 10.1021/acsnano.3c06133] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
Chirality-induced spin selectivity (CISS) is a recently discovered effect in which structural chirality can result in different conductivities for electrons with opposite spins. In the CISS community, the degree of spin polarization is commonly used to describe the efficiency of the spin filtering/polarizing process, as it represents the fraction of spins aligned along the chiral axis of chiral materials originating from non-spin-polarized currents. However, the methods of defining, calculating, and analyzing spin polarization have been inconsistent across various studies, hindering advances in this field. In this Perspective, we connect the relevant background and the definition of spin polarization, discuss its calculation in different contexts in the CISS, and propose a practical and meaningful figure of merit by quantitative analysis of magnetoresistance in CISS transport studies.
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Affiliation(s)
- Tianhan Liu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Paul S Weiss
- Departments of Chemistry and Biochemistry, Bioengineering, and Materials Science and Engineering and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
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27
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Subotnik JE. Chiral molecules to transmit electron spin. Science 2023; 382:160-161. [PMID: 37824631 DOI: 10.1126/science.adk5634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Electron transfer through chiral molecules displays a strong spin preference.
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Affiliation(s)
- Joseph E Subotnik
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA
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28
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Kim B, Shin D, Namgung S, Park N, Kim KW, Kim J. Optoelectronic Manifestation of Orbital Angular Momentum Driven by Chiral Hopping in Helical Se Chains. ACS NANO 2023; 17:18873-18882. [PMID: 37772489 DOI: 10.1021/acsnano.3c03893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
Chiral materials have garnered significant attention in the field of condensed matter physics. Nevertheless, the magnetic moment induced by the chiral spatial motion of electrons in helical materials, such as elemental Te and Se, remains inadequately understood. In this work, we investigate the development of quantum angular momentum enforced by chirality by using static and time-dependent density functional theory calculations for an elemental Se chain. Our findings reveal the emergence of an unconventional orbital texture driven by the chiral geometry, giving rise to a nonvanishing current-induced orbital moment. By incorporating spin-orbit coupling, we demonstrate that current-induced spin accumulation arises in the chiral chain, which fundamentally differs from the conventional Edelstein effect. Furthermore, we demonstrate optoelectronic detection of the orbital angular momentum in the chiral Se chain, providing an alternative to the interband Berry curvature, which is ill-defined in low dimensions.
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Affiliation(s)
- Bumseop Kim
- Graduate School of Semiconductor Materials and Devices Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea
| | - Dongbin Shin
- Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Korea
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free Electron Laser Science, Hamburg 22761, Germany
| | - Seon Namgung
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea
| | - Noejung Park
- Graduate School of Semiconductor Materials and Devices Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea
| | - Kyoung-Whan Kim
- Center for Spintronics, Korea Institute of Science and Technology, Seoul 02792, Korea
| | - Jeongwoo Kim
- Department of Physics, Incheon National University, Incheon 22012, Korea
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29
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Alhyder R, Cappellaro A, Lemeshko M, Volosniev AG. Achiral dipoles on a ferromagnet can affect its magnetization direction. J Chem Phys 2023; 159:104103. [PMID: 37694742 DOI: 10.1063/5.0165806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 08/22/2023] [Indexed: 09/12/2023] Open
Abstract
We demonstrate the possibility of a coupling between the magnetization direction of a ferromagnet and the tilting angle of adsorbed achiral molecules. To illustrate the mechanism of the coupling, we analyze a minimal Stoner model that includes Rashba spin-orbit coupling due to the electric field on the surface of the ferromagnet. The proposed mechanism allows us to study magnetic anisotropy of the system with an extended Stoner-Wohlfarth model and argue that adsorbed achiral molecules can change magnetocrystalline anisotropy of the substrate. Our research aims to motivate further experimental studies of the current-free chirality induced spin selectivity effect involving both enantiomers.
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Affiliation(s)
- Ragheed Alhyder
- Institute of Science and Technology Austria (ISTA), Am Campus 1, Klosterneuburg 3400, Austria
| | - Alberto Cappellaro
- Institute of Science and Technology Austria (ISTA), Am Campus 1, Klosterneuburg 3400, Austria
| | - Mikhail Lemeshko
- Institute of Science and Technology Austria (ISTA), Am Campus 1, Klosterneuburg 3400, Austria
| | - Artem G Volosniev
- Institute of Science and Technology Austria (ISTA), Am Campus 1, Klosterneuburg 3400, Austria
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30
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García-Blázquez MA, Dednam W, Palacios JJ. Nonequilibrium Magneto-Conductance as a Manifestation of Spin Filtering in Chiral Nanojunctions. J Phys Chem Lett 2023; 14:7931-7939. [PMID: 37646507 PMCID: PMC10494227 DOI: 10.1021/acs.jpclett.3c01922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 08/10/2023] [Indexed: 09/01/2023]
Abstract
It is generally accepted that spin-dependent electron transmission may appear in chiral systems, even without magnetic components, as long as significant spin-orbit coupling is present in some of its elements. However, how this chirality-induced spin selectivity (CISS) manifests in experiments, where the system is taken out of equilibrium, is still debated. Aided by group theoretical considerations and nonequilibrium DFT-based quantum transport calculations, here we show that when spatial symmetries that forbid a finite spin polarization in equilibrium are broken, a net spin accumulation appears at finite bias in an arbitrary two-terminal nanojunction. Furthermore, when a suitably magnetized detector is introduced into the system, the net spin accumulation, in turn, translates into a finite magneto-conductance. The symmetry prerequisites are mostly analogous to those for the spin polarization at any bias with the vectorial nature given by the direction of magnetization, hence establishing an interconnection between these quantities.
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Affiliation(s)
- M. A. García-Blázquez
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | - W. Dednam
- Department
of Physics, Science Campus, University of
South Africa, Florida
Park, Johannesburg 1710, South Africa
| | - J. J. Palacios
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
- Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, E-28049 Madrid, Spain
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31
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Adhikari Y, Liu T, Wang H, Hua Z, Liu H, Lochner E, Schlottmann P, Yan B, Zhao J, Xiong P. Interplay of structural chirality, electron spin and topological orbital in chiral molecular spin valves. Nat Commun 2023; 14:5163. [PMID: 37620378 PMCID: PMC10449876 DOI: 10.1038/s41467-023-40884-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 08/15/2023] [Indexed: 08/26/2023] Open
Abstract
Chirality has been a property of central importance in physics, chemistry and biology for more than a century. Recently, electrons were found to become spin polarized after transmitting through chiral molecules, crystals, and their hybrids. This phenomenon, called chirality-induced spin selectivity (CISS), presents broad application potentials and far-reaching fundamental implications involving intricate interplays among structural chirality, topological states, and electronic spin and orbitals. However, the microscopic picture of how chiral geometry influences electronic spin remains elusive, given the negligible spin-orbit coupling (SOC) in organic molecules. In this work, we address this issue via a direct comparison of magnetoconductance (MC) measurements on magnetic semiconductor-based chiral molecular spin valves with normal metal electrodes of contrasting SOC strengths. The experiment reveals that a heavy-metal electrode provides SOC to convert the orbital polarization induced by the chiral molecular structure to spin polarization. Our results illustrate the essential role of SOC in the metal electrode for the CISS spin valve effect. A tunneling model with a magnetochiral modulation of the potential barrier is shown to quantitatively account for the unusual transport behavior.
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Affiliation(s)
- Yuwaraj Adhikari
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Tianhan Liu
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Hailong Wang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, 100083, Beijing, China
| | - Zhenqi Hua
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Haoyang Liu
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Eric Lochner
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Pedro Schlottmann
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
| | - Binghai Yan
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel.
| | - Jianhua Zhao
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, 100083, Beijing, China.
| | - Peng Xiong
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA.
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32
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Lu Y, Joy M, Bloom BP, Waldeck DH. Beyond Stereoisomeric Effects: Exploring the Importance of Intermolecular Electron Spin Interactions in Biorecognition. J Phys Chem Lett 2023; 14:7032-7037. [PMID: 37524051 PMCID: PMC10424231 DOI: 10.1021/acs.jpclett.3c01595] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 07/26/2023] [Indexed: 08/02/2023]
Abstract
This work shows that electron spin polarization and stereoisomeric effects make comparable contributions to the enantioselective binding of amino acids. Magneto-electrochemical quartz crystal microbalance methods are used to study the adsorption of chiral amino acids onto a monolayer film of chiral molecules that are spin polarized by an underlying ferromagnetic substrate. The direction of the electron spin polarization affects both the kinetics and thermodynamics of the enantiospecific adsorption of the amino acids. Comparison of these data with the circular dichroism (CD) spectra of the amino acid adsorbates shows that the CD spectrum of the interacting group provides a good figure-of-merit for predicting the contributions of electron spin to the intermolecular interaction. These findings demonstrate the importance of electron spin in enantioselective intermolecular interactions between chiral amino acids and represent a paradigm shift for how selectivity should be viewed in biorecognition.
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Affiliation(s)
- Yiyang Lu
- Chemistry
Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Meera Joy
- Chemistry
Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Brian P. Bloom
- Chemistry
Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - David H. Waldeck
- Chemistry
Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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33
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Firouzeh S, Illescas-Lopez S, Hossain MA, Cuerva JM, Álvarez de Cienfuegos L, Pramanik S. Chirality-induced spin selectivity in functionalized carbon nanotube networks: The role of spin-orbit coupling. J Chem Phys 2023; 159:034708. [PMID: 37466230 DOI: 10.1063/5.0156348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 06/28/2023] [Indexed: 07/20/2023] Open
Abstract
Spin-orbit coupling in a chiral medium is generally assumed to be a necessary ingredient for the observation of the chirality-induced spin selectivity (CISS) effect. However, some recent studies have suggested that CISS may manifest even when the chiral medium has zero spin-orbit coupling. In such systems, CISS may arise due to an orbital polarization effect, which generates an electromagnetochiral anisotropy in two-terminal conductance. Here, we examine these concepts using a chirally functionalized carbon nanotube network as the chiral medium. A transverse measurement geometry is used, which nullifies any electromagnetochiral contribution but still exhibits the tell-tale signs of the CISS effect. This suggests that CISS may not be explained solely by electromagnetochiral effects. The role of nanotube spin-orbit coupling on the observed pure CISS signal is studied by systematically varying nanotube diameter. We find that the magnitude of the CISS signal scales proportionately with the spin-orbit coupling strength of the nanotubes. We also find that nanotube diameter dictates the supramolecular chirality of the medium, which in turn determines the sign of the CISS signal.
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Affiliation(s)
- Seyedamin Firouzeh
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Sara Illescas-Lopez
- Universidad de Granada, Departamento de Química Orgánica, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, C. U. Fuentenueva, Avda. Severo Ochoa s/n, E-18071 Granada, Spain
| | - Md Anik Hossain
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Juan Manuel Cuerva
- Universidad de Granada, Departamento de Química Orgánica, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, C. U. Fuentenueva, Avda. Severo Ochoa s/n, E-18071 Granada, Spain
| | - Luis Álvarez de Cienfuegos
- Universidad de Granada, Departamento de Química Orgánica, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, C. U. Fuentenueva, Avda. Severo Ochoa s/n, E-18071 Granada, Spain
- Instituto de Investigación Biosanitaria ibs, Avda. De Madrid, 15, E-18016 Granada, Spain
| | - Sandipan Pramanik
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
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34
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Xu Y, Mi W. Chiral-induced spin selectivity in biomolecules, hybrid organic-inorganic perovskites and inorganic materials: a comprehensive review on recent progress. MATERIALS HORIZONS 2023; 10:1924-1955. [PMID: 36989068 DOI: 10.1039/d3mh00024a] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The two spin states of electrons are degenerate in nonmagnetic materials. The chiral-induced spin selectivity (CISS) effect provides a new strategy for manipulating electron's spin and a deeper understanding of spin selective processes in organisms. Here, we summarize the important discoveries and recent experiments performed during the development of the CISS effect, analyze the spin polarized transport in various types of materials and discuss the mechanisms, theoretical calculations, experimental techniques and biological significance of the CISS effect. The first part of this review concisely presents a general overview of the discoveries and importance of the CISS effect, laws and underlying mechanisms of which are discussed in the next section, where several classical experimental methods for detecting the CISS effect are also introduced. Based on the organic and inorganic properties of materials, the CISS effect of organic biomolecules, hybrid organic-inorganic perovskites and inorganic materials are reviewed in the third, fourth and fifth sections, especially the chiral transfer mechanism of hybrid materials and the relationship between the CISS effect and life science. In addition, conclusions and prospective future of the CISS effect are outlined at the end, where the development and applications of the CISS effect in spintronics are directly described, which is helpful for designing promising chiral spintronic devices and understanding the natural status of chirality from a new perspective.
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Affiliation(s)
- Yingdan Xu
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University, Tianjin 300354, China.
| | - Wenbo Mi
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University, Tianjin 300354, China.
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35
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Dednam W, García-Blázquez MA, Zotti LA, Lombardi EB, Sabater C, Pakdel S, Palacios JJ. A Group-Theoretic Approach to the Origin of Chirality-Induced Spin-Selectivity in Nonmagnetic Molecular Junctions. ACS NANO 2023; 17:6452-6465. [PMID: 36947721 PMCID: PMC10100547 DOI: 10.1021/acsnano.2c11410] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 03/16/2023] [Indexed: 06/18/2023]
Abstract
Spin-orbit coupling gives rise to a range of spin-charge interconversion phenomena in nonmagnetic systems where certain spatial symmetries are reduced or absent. Chirality-induced spin-selectivity (CISS), a term that generically refers to a spin-dependent electron transfer in nonmagnetic chiral systems, is one such case, appearing in a variety of seemingly unrelated situations ranging from inorganic materials to molecular devices. In particular, the origin of CISS in molecular junctions is a matter of an intense current debate. Here, we derive a set of geometrical conditions for this effect to appear, hinting at the fundamental role of symmetries beyond otherwise relevant quantitative issues. Our approach, which draws on the use of point-group symmetries within the scattering formalism for transport, shows that electrode symmetries are as important as those of the molecule when it comes to the emergence of a spin-polarization and, by extension, to the possible appearance of CISS. It turns out that standalone metallic nanocontacts can exhibit spin-polarization when relative rotations which reduce the symmetry are introduced. As a corollary, molecular junctions with achiral molecules can also exhibit spin-polarization along the direction of transport, provided that the whole junction is chiral in a specific way. This formalism also allows the prediction of qualitative changes of the spin-polarization upon substitution of a chiral molecule in the junction with its enantiomeric partner. Quantum transport calculations based on density functional theory corroborate all of our predictions and provide further quantitative insight within the single-particle framework.
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Affiliation(s)
- W. Dednam
- Department
of Physics, Florida Science Campus, University
of South Africa, 1710 Johannesburg, South Africa
| | - M. A. García-Blázquez
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | - Linda A. Zotti
- Departamento
de Física Teórica de la Materia Condensada, Universidad Autonoma de Madrid, E-28049 Madrid, Spain
- Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, E-28049 Madrid, Spain
| | - E. B. Lombardi
- Department
of Physics, Florida Science Campus, University
of South Africa, 1710 Johannesburg, South Africa
| | - C. Sabater
- Departamento
de Física Aplicada and Unidad asociada CSIC, Universidad de Alicante, E-03690 Alicante, Spain
| | - S. Pakdel
- CAMD, Department
of Physics, Technical University of Denmark, 2800 Lyngby, Denmark
| | - J. J. Palacios
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
- Instituto
Nicolás Cabrera (INC) and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, E-28049 Madrid, Spain
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36
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Ha Nguyen TN, Paltiel Y, Baczewski LT, Tegenkamp C. Spin Polarization of Polyalanine Molecules in 2D and Dimer-Row Assemblies Adsorbed on Magnetic Substrates: The Role of Coupling, Chirality, and Coordination. ACS APPLIED MATERIALS & INTERFACES 2023; 15:17406-17412. [PMID: 36952617 DOI: 10.1021/acsami.3c01429] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Propagation of electrons along helical molecules adsorbed on surfaces comes along with a robust spin polarization effect called chirality induced spin selectivity CISS. However, experiments on the molecular scale that allow a true correlation of spin effects with the molecular structure are quite rare. Here we have studied the structure of self-assembled chiral molecules and the electronic transmission and spin polarization of the current through the system by means of ambient scanning tunneling microscopy and spectroscopy in heterostructures of various α-helix polyalanine-based molecules (PA) adsorbed on Al2O3/Pt/Au/Co/Au substrates with perpendicular magnetic anisotropy. We have found a phase separation of the molecules into well-ordered enantiopure 2D hexagonal phases and quasi-1D heterochiral-dimer structures, which allows for the analysis of the spin polarization with almost atomic precision of PA in different phases. The spin polarization reaches up to 75% for chemisorbed molecules arranged in a hexagonal phase. On the contrary, for weakly coupled PA molecules without cysteine anchoring groups in a quasi-1D phase, a spin polarization of around 50% was found. Our results show that both the intermolecular interaction as well as the coupling to the substrate are important and point out that collective effects within the molecules and at the interfaces are required to achieve a high chiral induced spin selectivity.
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Affiliation(s)
- Thi Ngoc Ha Nguyen
- Solid Surface Analysis, Institute of Physics, Chemnitz University of Technology, Reichenhainer Strasse 70, Chemnitz 09126, Germany
| | - Yossi Paltiel
- Department of Applied Physics, Hebrew University of Jerusalem, Jerusalem 91905, Israel
- Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem, Jerusalem 91905, Israel
| | - Lech T Baczewski
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warszawa 02-668, Poland
| | - Christoph Tegenkamp
- Solid Surface Analysis, Institute of Physics, Chemnitz University of Technology, Reichenhainer Strasse 70, Chemnitz 09126, Germany
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37
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Hossain MA, Illescas-Lopez S, Nair R, Cuerva JM, Álvarez de Cienfuegos L, Pramanik S. Transverse magnetoconductance in two-terminal chiral spin-selective devices. NANOSCALE HORIZONS 2023; 8:320-330. [PMID: 36740957 DOI: 10.1039/d2nh00502f] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The phenomenon of chirality induced spin selectivity (CISS) has triggered significant activity in recent years, although many aspects of it remain to be understood. For example, most investigations are focused on spin polarizations collinear to the charge current, and hence longitudinal magnetoconductance (MC) is commonly studied in two-terminal transport experiments. Very little is known about the transverse spin components and transverse MC - their existence, as well as any dependence of this component on chirality. Furthermore, the measurement of the CISS effect via two-terminal MC experiments remains a controversial topic. Detection of this effect in the linear response regime is debated, with contradicting reports in the literature. Finally, the potential influence of the well-known electric magnetochiral effect on CISS remains unclear. To shed light on these issues, in this work we have investigated the bias dependence of the CISS effect using planar carbon nanotube networks functionalized with chiral molecules. We find that (a) transverse MC exists and exhibits tell-tale signs of the CISS effect, (b) transverse CISS MC vanishes in the linear response regime establishing the validity of Onsager's relation in two-terminal CISS systems, and finally (c) the CISS signal remains present even in the absence of electric magneto chiral effects, suggesting the existence of an alternative physical origin of CISS MC.
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Affiliation(s)
- Md Anik Hossain
- Department of Electrical and Computer Engineering, University of Alberta, Alberta, T6G 1H9, Canada.
| | - Sara Illescas-Lopez
- Departamento de Química Orgánica, Universidad de Granada, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, C. U. Fuentenueva, Avda. Severo Ochoa s/n, E-18071, Granada, Spain
| | - Rahul Nair
- Department of Electrical and Computer Engineering, University of Alberta, Alberta, T6G 1H9, Canada.
- School of Electronics Engineering, Vellore Institute of Technology, Chennai, 600127, India
| | - Juan Manuel Cuerva
- Departamento de Química Orgánica, Universidad de Granada, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, C. U. Fuentenueva, Avda. Severo Ochoa s/n, E-18071, Granada, Spain
| | - Luis Álvarez de Cienfuegos
- Departamento de Química Orgánica, Universidad de Granada, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, C. U. Fuentenueva, Avda. Severo Ochoa s/n, E-18071, Granada, Spain
- Instituto de Investigación Biosanitaria ibs. Avda. De Madrid, 15, E-18016, Granada, Spain
| | - Sandipan Pramanik
- Department of Electrical and Computer Engineering, University of Alberta, Alberta, T6G 1H9, Canada.
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38
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Thanh Phuc N. Chiral-Induced Spin Selectivity in Photon-Coupled Achiral Matters. J Phys Chem Lett 2023; 14:1626-1632. [PMID: 36750980 DOI: 10.1021/acs.jpclett.2c03735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Chiral-induced spin selectivity is a phenomenon in which electron spins are polarized as they are transported through chiral molecules, and the spin polarization depends on the handedness of the chiral molecule. In this study, we show that spin selectivity can be realized in achiral materials by strongly coupling electrons to a circularly polarized mode of an optical cavity or waveguide. Through the investigation of spin-dependent electron transport in a two-terminal setup using the nonequilibrium Green's function approach, it is found that a large spin polarization can be obtained if the rate of dephasing is sufficiently small and the average chemical potential of the two leads is within an appropriate range of values, which is narrow because of the high frequency of the optical mode. To obtain a wider range of energies for a large spin polarization, chiral molecules can be combined with light-matter interactions. To demonstrate this, the spin polarization of electrons transported through a helical molecule strongly coupled to a circularly polarized optical mode is evaluated.
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Affiliation(s)
- Nguyen Thanh Phuc
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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39
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Naskar S, Mujica V, Herrmann C. Chiral-Induced Spin Selectivity and Non-equilibrium Spin Accumulation in Molecules and Interfaces: A First-Principles Study. J Phys Chem Lett 2023; 14:694-701. [PMID: 36638217 DOI: 10.1021/acs.jpclett.2c03747] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Electrons moving through chiral molecules are selected according to their spin orientation and the helicity of the molecule, an effect known as chiral-induced spin selectivity (CISS). The underlying physical mechanism is not yet completely understood. To help elucidate this mechanism, a non-equilibrium Green's function method, combined with a Landauer approach and density functional theory, is applied to carbon helices contacted by gold electrodes, resulting in spin polarization of transmitted electrons. Spin polarization is also observed in the non-equilibrium electronic structure of the junctions. While this spin polarization is small, its sign changes with the direction of the current and with the handedness of the molecule. While these calculations were performed with a pure exchange-correlation functional, previous studies suggest that computationally more expensive hybrid functionals may lead to considerably larger spin polarization in the electronic structure. Thus, non-equilibrium spin polarization could be a key component in understanding the CISS mechanism.
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Affiliation(s)
- Sumit Naskar
- Department of Chemistry, University of Hamburg, Harbor Building 610, Luruper Chaussee 149, 22761Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761Hamburg, Germany
| | - Vladimiro Mujica
- School of Molecular Sciences, Arizona State University, Tempe, Arizona85287, United States
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU and Donostia International Physics Center, Manuel de Lardizabal Pasealekua 3, 20018Donostia, Euskadi, Spain
| | - Carmen Herrmann
- Department of Chemistry, University of Hamburg, Harbor Building 610, Luruper Chaussee 149, 22761Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761Hamburg, Germany
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40
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Yang SJ, Choi MY, Kim CJ. Engineering Grain Boundaries in Two-Dimensional Electronic Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2203425. [PMID: 35777352 DOI: 10.1002/adma.202203425] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Engineering the boundary structures in 2D materials provides an unprecedented opportunity to program the physical properties of the materials with extensive tunability and realize innovative devices with advanced functionalities. However, structural engineering technology is still in its infancy, and creating artificial boundary structures with high reproducibility remains difficult. In this review, various emergent properties of 2D materials with different grain boundaries, and the current techniques to control the structures, are introduced. The remaining challenges for scalable and reproducible structure control and the outlook on the future directions of the related techniques are also discussed.
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Affiliation(s)
- Seong-Jun Yang
- Center for Epitaxial van der Waals Quantum Solids, Institute for Basic Science (IBS), Pohang, Gyeongbuk, 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Min-Yeong Choi
- Center for Epitaxial van der Waals Quantum Solids, Institute for Basic Science (IBS), Pohang, Gyeongbuk, 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Cheol-Joo Kim
- Center for Epitaxial van der Waals Quantum Solids, Institute for Basic Science (IBS), Pohang, Gyeongbuk, 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 37673, Republic of Korea
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41
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Wolf Y, Liu Y, Xiao J, Park N, Yan B. Unusual Spin Polarization in the Chirality-Induced Spin Selectivity. ACS NANO 2022; 16:18601-18607. [PMID: 36282509 PMCID: PMC9706810 DOI: 10.1021/acsnano.2c07088] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 09/29/2022] [Indexed: 06/07/2023]
Abstract
Chirality-induced spin selectivity (CISS) refers to the fact that electrons get spin polarized after passing through chiral molecules in a nanoscale transport device or in photoemission experiments. In CISS, chiral molecules are commonly believed to be a spin filter through which one favored spin transmits and the opposite spin gets reflected; that is, transmitted and reflected electrons exhibit opposite spin polarization. In this work, we point out that such a spin filter scenario contradicts the principle that equilibrium spin current must vanish. Instead, we find that both transmitted and reflected electrons present the same type of spin polarization, which is actually ubiquitous for a two-terminal device. More accurately, chiral molecules play the role of a spin polarizer rather than a spin filter. The direction of spin polarization is determined by the molecule chirality and the electron incident direction. And the magnitude of spin polarization relies on local spin-orbit coupling in the device. Our work brings a deeper understanding on CISS and interprets recent experiments, for example, the CISS-driven anomalous Hall effect.
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Affiliation(s)
- Yotam Wolf
- Department
of Condensed Matter Physics, Weizmann Institute
of Science, Rehovot7610001, Israel
| | - Yizhou Liu
- Department
of Condensed Matter Physics, Weizmann Institute
of Science, Rehovot7610001, Israel
| | - Jiewen Xiao
- Department
of Condensed Matter Physics, Weizmann Institute
of Science, Rehovot7610001, Israel
| | - Noejung Park
- Department
of Physics, Ulsan National Institute of
Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Binghai Yan
- Department
of Condensed Matter Physics, Weizmann Institute
of Science, Rehovot7610001, Israel
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42
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Möllers PV, Göhler B, Zacharias H. Chirality Induced Spin Selectivity – the Photoelectron View. Isr J Chem 2022. [DOI: 10.1002/ijch.202200062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Paul V. Möllers
- Center for Soft Nanoscience University of Münster Busso-Peus-Str. 10 48149 Münster Germany
| | - Benjamin Göhler
- Center for Soft Nanoscience University of Münster Busso-Peus-Str. 10 48149 Münster Germany
| | - Helmut Zacharias
- Center for Soft Nanoscience University of Münster Busso-Peus-Str. 10 48149 Münster Germany
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43
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Lopes V, Chiappe G, Ribeiro LC, Anda EV. Totally Spin-Polarized Currents in an Interferometer with Spin-Orbit Coupling and the Absence of Magnetic Field Effects. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4082. [PMID: 36432367 PMCID: PMC9696532 DOI: 10.3390/nano12224082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/14/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Abstract
The paper studies the electronic current in a one-dimensional lead under the effect of spin-orbit coupling and its injection into a metallic conductor through two contacts, forming a closed loop. When an external potential is applied, the time reversal symmetry is broken and the wave vector k of the circulating electrons that contribute to the current is spin-dependent. As the wave function phase depends upon the vector k, the closed path in the circuit produces spin-dependent current interference. This creates a physical scenario in which a spin-polarized current emerges, even in the absence of external magnetic fields or magnetic materials. It is possible to find points in the system's parameter space and, depending upon its geometry, the value of the Fermi energy and the spin-orbit intensities, for which the electronic states participating in the current have only one spin, creating a high and totally spin-polarized conductance. For a potential of a few tens of meV, it is possible to obtain a spin-polarized current of the order of μA. The properties of the obtained electronic current qualify the proposed device as a potentially important tool for spintronics applications.
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Affiliation(s)
- Victor Lopes
- Departamento de Física Aplicada, Universidad de Alicante, San Vicente del Raspeig, 03690 Alicante, Spain
| | - Guillermo Chiappe
- Departamento de Física Aplicada, Universidad de Alicante, San Vicente del Raspeig, 03690 Alicante, Spain
| | - Laercio C. Ribeiro
- Centro Federal de Educação Tecnológica Celso Suckow da Fonseca CEFET/RJ, Campus Nova Iguaçu, Nova Iguaçu, Rio de Janeiro 26041-271, Brazil
| | - Enrique V. Anda
- Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro 22451-900, Brazil
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44
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Müllner S, Büscher F, Möller A, Lemmens P. Discrimination of Chiral and Helical Contributions to Raman Scattering of Liquid Crystals Using Vortex Beams. PHYSICAL REVIEW LETTERS 2022; 129:207801. [PMID: 36461998 DOI: 10.1103/physrevlett.129.207801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 10/24/2022] [Indexed: 06/17/2023]
Abstract
We use vortex photon fields with orbital and spin angular momentum to probe chiral fluctuations within liquid crystals. In the regime of iridescence with a well-defined pitch length of chirality, we find low energy Raman scattering that can be decomposed into helical and chiral components depending on the scattering vector and the topological charge of the incident photon field. Based on the observation of an anomalous dispersion we attribute quasielastic scattering to a transfer of angular momenta to rotonlike quasiparticles. The latter are due to a competition of short-range repulsive and long-range dipolar interactions. Our approach using a transfer of orbital angular momentum opens up an avenue for the advanced characterization of chiral and optically active devices and materials.
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Affiliation(s)
- Silvia Müllner
- Institute for Condensed Matter Physics, University of Technology Braunschweig, D-38106 Braunschweig, Germany
| | - Florian Büscher
- Institute for Condensed Matter Physics, University of Technology Braunschweig, D-38106 Braunschweig, Germany
| | - Angela Möller
- Department of Chemistry, JGU Mainz, D-55128 Mainz, Germany
| | - Peter Lemmens
- Institute for Condensed Matter Physics, University of Technology Braunschweig, D-38106 Braunschweig, Germany
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45
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Naskar S, Saghatchi A, Mujica V, Herrmann C. Common Trends of Chiral Induced Spin Selectivity and Optical Dichroism with Varying Helix Pitch: A First‐Principles Study. Isr J Chem 2022. [DOI: 10.1002/ijch.202200053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sumit Naskar
- Department of Chemistry University of Hamburg, Harbor Bldg. 610 Luruper Chaussee 149 22761 Hamburg Germany
- The Hamburg Centre for Ultrafast Imaging Luruper Chaussee 149 Hamburg 22761 Germany
| | - Aida Saghatchi
- Department of Chemistry University of Hamburg, Harbor Bldg. 610 Luruper Chaussee 149 22761 Hamburg Germany
| | - Vladimiro Mujica
- School for Molecular Science Arizona State University Arizona, U.S.A
- Kimika Fakultatea Euskal Herriko Unibertsitatea UPV/EHU Manuel de Lardizabal Pasealekua 3 20018 Donostia, Euskadi Spain
| | - Carmen Herrmann
- Department of Chemistry University of Hamburg, Harbor Bldg. 610 Luruper Chaussee 149 22761 Hamburg Germany
- The Hamburg Centre for Ultrafast Imaging Luruper Chaussee 149 Hamburg 22761 Germany
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46
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Controlled large non-reciprocal charge transport in an intrinsic magnetic topological insulator MnBi 2Te 4. Nat Commun 2022; 13:6191. [PMID: 36261426 PMCID: PMC9582003 DOI: 10.1038/s41467-022-33705-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 09/28/2022] [Indexed: 11/08/2022] Open
Abstract
Symmetries, quantum geometries and electronic correlations are among the most important ingredients of condensed matters, and lead to nontrivial phenomena in experiments, for example, non-reciprocal charge transport. Of particular interest is whether the non-reciprocal transport can be manipulated. Here, we report the controllable large non-reciprocal charge transport in the intrinsic magnetic topological insulator MnBi2Te4. The current direction relevant resistance is observed at chiral edges, which is magnetically switchable, edge position sensitive and stacking sequence controllable. Applying gate voltage can also effectively manipulate the non-reciprocal response. The observation and manipulation of non-reciprocal charge transport reveals the fundamental role of chirality in charge transport of MnBi2Te4, and pave ways to develop van der Waals spintronic devices by chirality engineering.
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47
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Janitz E, Herb K, Völker LA, Huxter WS, Degen CL, Abendroth JM. Diamond surface engineering for molecular sensing with nitrogen-vacancy centers. JOURNAL OF MATERIALS CHEMISTRY. C 2022; 10:13533-13569. [PMID: 36324301 PMCID: PMC9521415 DOI: 10.1039/d2tc01258h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 08/06/2022] [Indexed: 05/20/2023]
Abstract
Quantum sensing using optically addressable atomic-scale defects, such as the nitrogen-vacancy (NV) center in diamond, provides new opportunities for sensitive and highly localized characterization of chemical functionality. Notably, near-surface defects facilitate detection of the minute magnetic fields generated by nuclear or electron spins outside of the diamond crystal, such as those in chemisorbed and physisorbed molecules. However, the promise of NV centers is hindered by a severe degradation of critical sensor properties, namely charge stability and spin coherence, near surfaces (< ca. 10 nm deep). Moreover, applications in the chemical sciences require methods for covalent bonding of target molecules to diamond with robust control over density, orientation, and binding configuration. This forward-looking Review provides a survey of the rapidly converging fields of diamond surface science and NV-center physics, highlighting their combined potential for quantum sensing of molecules. We outline the diamond surface properties that are advantageous for NV-sensing applications, and discuss strategies to mitigate deleterious effects while simultaneously providing avenues for chemical attachment. Finally, we present an outlook on emerging applications in which the unprecedented sensitivity and spatial resolution of NV-based sensing could provide unique insight into chemically functionalized surfaces at the single-molecule level.
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Affiliation(s)
- Erika Janitz
- Department of Physics, ETH Zürich Otto-Stern-Weg 1 8093 Zürich Switzerland
| | - Konstantin Herb
- Department of Physics, ETH Zürich Otto-Stern-Weg 1 8093 Zürich Switzerland
| | - Laura A Völker
- Department of Physics, ETH Zürich Otto-Stern-Weg 1 8093 Zürich Switzerland
| | - William S Huxter
- Department of Physics, ETH Zürich Otto-Stern-Weg 1 8093 Zürich Switzerland
| | - Christian L Degen
- Department of Physics, ETH Zürich Otto-Stern-Weg 1 8093 Zürich Switzerland
| | - John M Abendroth
- Department of Physics, ETH Zürich Otto-Stern-Weg 1 8093 Zürich Switzerland
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48
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Clever C, Wierzbinski E, Bloom BP, Lu Y, Grimm HM, Rao SR, Horne WS, Waldeck DH. Benchmarking Chiral Induced Spin Selectivity Measurements ‐ Towards Meaningful Comparisons of Chiral Biomolecule Spin Polarizations. Isr J Chem 2022. [DOI: 10.1002/ijch.202200045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Caleb Clever
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - Emil Wierzbinski
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - Brian P. Bloom
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - Yiyang Lu
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - Haley M. Grimm
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - Silpa R. Rao
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - W. Seth Horne
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - David H. Waldeck
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
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Möllers PV, Wei J, Salamon S, Bartsch M, Wende H, Waldeck DH, Zacharias H. Spin-Polarized Photoemission from Chiral CuO Catalyst Thin Films. ACS NANO 2022; 16:12145-12155. [PMID: 35943911 PMCID: PMC9413420 DOI: 10.1021/acsnano.2c02709] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 07/18/2022] [Indexed: 06/07/2023]
Abstract
The chirality-induced spin selectivity (CISS) effect facilitates a paradigm shift for controlling the outcome and efficiency of spin-dependent chemical reactions, for example, photoinduced water splitting. While the phenomenon is established in organic chiral molecules, its emergence in chiral but inorganic, nonmolecular materials is not yet understood. Nevertheless, inorganic spin-filtering materials offer favorable characteristics, such as thermal and chemical stability, over organic, molecular spin filters. Chiral cupric oxide (CuO) thin films can spin polarize (photo)electron currents, and this capability is linked to the occurrence of the CISS effect. In the present work, chiral CuO films, electrochemically deposited on partially UV-transparent polycrystalline gold substrates, were subjected to deep-UV laser pulses, and the average spin polarization of photoelectrons was measured in a Mott scattering apparatus. By energy resolving the photoelectrons and changing the photoexcitation geometry, the energy distribution and spin polarization of the photoelectrons originating from the Au substrate could be distinguished from those arising from the CuO film. The findings reveal that the spin polarization is energy dependent and, furthermore, indicate that the measured polarization values can be rationalized as a sum of an intrinsic spin polarization in the chiral oxide layer and a contribution via CISS-related spin filtering of electrons from the Au substrate. The results support efforts toward a rational design of further spin-selective catalytic oxide materials.
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Affiliation(s)
- Paul V. Möllers
- Department
of Physics and Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Jimeng Wei
- Chemistry
Department, University of Pittsburgh, 15260 Pittsburgh, Pennsylvania, United States
| | - Soma Salamon
- Faculty
of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), Universität Duisburg-Essen, 47057 Duisburg, Germany
| | - Manfred Bartsch
- Department
of Physics and Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Heiko Wende
- Faculty
of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), Universität Duisburg-Essen, 47057 Duisburg, Germany
| | - David H. Waldeck
- Chemistry
Department, University of Pittsburgh, 15260 Pittsburgh, Pennsylvania, United States
| | - Helmut Zacharias
- Department
of Physics and Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
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Yu H, Wang L, Liu S, Zhao B, Xiao K, Yang B, Duan H, Zhao H, Deng J. Using cellulose, starch and β-cyclodextrin poly/oligosaccharides as chiral inducers for preparing chiral particles. Carbohydr Polym 2022; 296:119944. [DOI: 10.1016/j.carbpol.2022.119944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 07/29/2022] [Accepted: 07/30/2022] [Indexed: 11/02/2022]
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