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Cheng G, Lin MH, Chen HY, Wang D, Wang Z, Qin W, Zhang Z, Zeng C. Reversible modulation of superconductivity in thin-film NbSe 2 via plasmon coupling. Nat Commun 2024; 15:6037. [PMID: 39019892 PMCID: PMC11255238 DOI: 10.1038/s41467-024-50452-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 07/10/2024] [Indexed: 07/19/2024] Open
Abstract
In recent years, lightwave has stood out as an ultrafast, non-contact control knob for developing compact superconducting circuitry. However, the modulation efficiency is limited by the low photoresponse of superconductors. Plasmons, with the advantages of strong light-matter interaction, present a promising route to overcome the limitations. Here we achieve effective modulation of superconductivity in thin-film NbSe2 via near-field coupling to plasmons in gold nanoparticles. Upon resonant plasmon excitation, the superconductivity of NbSe2 is substantially suppressed. The modulation factor exceeds 40% at a photon flux of 9.36 × 1013 s-1mm-2, and the effect is significantly diminished for thicker NbSe2 samples. Our observations can be theoretically interpreted by invoking the non-equilibrium electron distribution in NbSe2 driven by the plasmon-associated evanescent field. Finally, a reversible plasmon-driven superconducting switch is realized in this system. These findings highlight plasmonic tailoring of quantum states as an innovative strategy for superconducting electronics.
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Affiliation(s)
- Guanghui Cheng
- CAS Key Laboratory of Strongly Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, China.
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai, Japan.
| | | | | | - Dongli Wang
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China
| | - Zheyan Wang
- CAS Key Laboratory of Strongly Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, China
| | - Wei Qin
- CAS Key Laboratory of Strongly Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, China.
| | - Zhenyu Zhang
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China
- Hefei National Laboratory, Hefei, China
| | - Changgan Zeng
- CAS Key Laboratory of Strongly Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, China.
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China.
- Hefei National Laboratory, Hefei, China.
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2
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Bluschke M, Gupta NK, Jang H, Husain AA, Lee B, Kim M, Na M, Dos Remedios B, Smit S, Moen P, Park SY, Kim M, Jang D, Choi H, Sutarto R, Reid AH, Dakovski GL, Coslovich G, Nguyen QL, Burdet NG, Lin MF, Revcolevschi A, Park JH, Geck J, Turner JJ, Damascelli A, Hawthorn DG. Orbital-selective time-domain signature of nematicity dynamics in the charge-density-wave phase of La 1.65Eu 0.2Sr 0.15CuO 4. Proc Natl Acad Sci U S A 2024; 121:e2400727121. [PMID: 38819998 PMCID: PMC11161785 DOI: 10.1073/pnas.2400727121] [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: 01/12/2024] [Accepted: 04/25/2024] [Indexed: 06/02/2024] Open
Abstract
Understanding the interplay between charge, nematic, and structural ordering tendencies in cuprate superconductors is critical to unraveling their complex phase diagram. Using pump-probe time-resolved resonant X-ray scattering on the (0 0 1) Bragg peak at the Cu [Formula: see text] and O [Formula: see text] resonances, we investigate nonequilibrium dynamics of [Formula: see text] nematic order and its association with both charge density wave (CDW) order and lattice dynamics in La[Formula: see text]Eu[Formula: see text]Sr[Formula: see text]CuO[Formula: see text]. The orbital selectivity of the resonant X-ray scattering cross-section allows nematicity dynamics associated with the planar O 2[Formula: see text] and Cu 3[Formula: see text] states to be distinguished from the response of anisotropic lattice distortions. A direct time-domain comparison of CDW translational-symmetry breaking and nematic rotational-symmetry breaking reveals that these broken symmetries remain closely linked in the photoexcited state, consistent with the stability of CDW topological defects in the investigated pump fluence regime.
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Affiliation(s)
- Martin Bluschke
- Quantum Matter Institute, University of British Columbia, Vancouver, BCV6T 1Z4, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BCV6T 1Z1, Canada
| | - Naman K. Gupta
- Department of Physics and Astronomy, University of Waterloo, Waterloo, ONN2L 3G1, Canada
| | - Hoyoung Jang
- X-ray Free Electron Laser Beamline Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang37673, Gyeongbuk, Republic of Korea
- Photon Science Center, Pohang University of Science and Technology, Pohang37673, Gyeongbuk, Republic of Korea
| | - Ali. A. Husain
- Quantum Matter Institute, University of British Columbia, Vancouver, BCV6T 1Z4, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BCV6T 1Z1, Canada
| | - Byungjune Lee
- Max Planck - Pohang University of Science and Technology/Korea Research Initiative, Center for Complex Phase Materials, Pohang37673, Republic of Korea
- Department of Physics, Pohang University of Science and Technology, Pohang37673, Republic of Korea
| | - Minjune Kim
- Quantum Matter Institute, University of British Columbia, Vancouver, BCV6T 1Z4, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BCV6T 1Z1, Canada
| | - MengXing Na
- Quantum Matter Institute, University of British Columbia, Vancouver, BCV6T 1Z4, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BCV6T 1Z1, Canada
| | - Brandon Dos Remedios
- Quantum Matter Institute, University of British Columbia, Vancouver, BCV6T 1Z4, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BCV6T 1Z1, Canada
| | - Steef Smit
- Quantum Matter Institute, University of British Columbia, Vancouver, BCV6T 1Z4, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BCV6T 1Z1, Canada
| | - Peter Moen
- Quantum Matter Institute, University of British Columbia, Vancouver, BCV6T 1Z4, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BCV6T 1Z1, Canada
| | - Sang-Youn Park
- X-ray Free Electron Laser Beamline Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang37673, Gyeongbuk, Republic of Korea
| | - Minseok Kim
- X-ray Free Electron Laser Beamline Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang37673, Gyeongbuk, Republic of Korea
| | - Dogeun Jang
- X-ray Free Electron Laser Beamline Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang37673, Gyeongbuk, Republic of Korea
| | - Hyeongi Choi
- X-ray Free Electron Laser Beamline Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang37673, Gyeongbuk, Republic of Korea
| | | | - Alexander H. Reid
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA94025
| | - Georgi L. Dakovski
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA94025
| | - Giacomo Coslovich
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA94025
| | - Quynh L. Nguyen
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA94025
- Stanford PULSE Institute, Stanford University and Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA94025
| | - Nicolas G. Burdet
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA94025
- Stanford Institute for Materials and Energy Sciences, Stanford Linear Accelerator Center National Accelerator Laboratory and Stanford University, Menlo Park, CA94025
| | - Ming-Fu Lin
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA94025
| | - Alexandre Revcolevschi
- Institut de Chimie Moléculaire et des Matériaux d’Orsay, Université Paris-Saclay, Centre National de la Recherche Scientifique, UMR 8182, 91405Orsay, France
| | - Jae-Hoon Park
- Max Planck - Pohang University of Science and Technology/Korea Research Initiative, Center for Complex Phase Materials, Pohang37673, Republic of Korea
- Department of Physics, Pohang University of Science and Technology, Pohang37673, Republic of Korea
| | - Jochen Geck
- Institute of Solid State and Materials Physics, Technische Universität Dresden, 01069Dresden, Germany
- Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062Dresden, Germany
| | - Joshua J. Turner
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA94025
- Stanford Institute for Materials and Energy Sciences, Stanford Linear Accelerator Center National Accelerator Laboratory and Stanford University, Menlo Park, CA94025
| | - Andrea Damascelli
- Quantum Matter Institute, University of British Columbia, Vancouver, BCV6T 1Z4, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BCV6T 1Z1, Canada
| | - David G. Hawthorn
- Department of Physics and Astronomy, University of Waterloo, Waterloo, ONN2L 3G1, Canada
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3
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Eckhardt CJ, Chattopadhyay S, Kennes DM, Demler EA, Sentef MA, Michael MH. Theory of resonantly enhanced photo-induced superconductivity. Nat Commun 2024; 15:2300. [PMID: 38485935 PMCID: PMC10940728 DOI: 10.1038/s41467-024-46632-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 02/29/2024] [Indexed: 03/18/2024] Open
Abstract
Optical driving of materials has emerged as a versatile tool to control their properties, with photo-induced superconductivity being among the most fascinating examples. In this work, we show that light or lattice vibrations coupled to an electronic interband transition naturally give rise to electron-electron attraction that may be enhanced when the underlying boson is driven into a non-thermal state. We find this phenomenon to be resonantly amplified when tuning the boson's frequency close to the energy difference between the two electronic bands. This result offers a simple microscopic mechanism for photo-induced superconductivity and provides a recipe for designing new platforms in which light-induced superconductivity can be realized. We discuss two-dimensional heterostructures as a potential test ground for light-induced superconductivity concretely proposing a setup consisting of a graphene-hBN-SrTiO3 heterostructure, for which we estimate a superconducting Tc that may be achieved upon driving the system.
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Affiliation(s)
- Christian J Eckhardt
- Max Planck Institute for the Structure and Dynamics of Matter, Center for Free-Electron Laser Science (CFEL), Luruper Chaussee 149, 22761, Hamburg, Germany
- Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA-Fundamentals of Future Information Technology, 52056, Aachen, Germany
| | | | - Dante M Kennes
- Max Planck Institute for the Structure and Dynamics of Matter, Center for Free-Electron Laser Science (CFEL), Luruper Chaussee 149, 22761, Hamburg, Germany
- Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA-Fundamentals of Future Information Technology, 52056, Aachen, Germany
| | - Eugene A Demler
- Institute for Theoretical Physics, ETH Zürich, 8093, Zürich, Switzerland
| | - Michael A Sentef
- Max Planck Institute for the Structure and Dynamics of Matter, Center for Free-Electron Laser Science (CFEL), Luruper Chaussee 149, 22761, Hamburg, Germany
- Institute for Theoretical Physics and Bremen Center for Computational Materials Science, University of Bremen, 28359, Bremen, Germany
- H H Wills Physics Laboratory, University of Bristol, Bristol, BS8 1TL, UK
| | - Marios H Michael
- Max Planck Institute for the Structure and Dynamics of Matter, Center for Free-Electron Laser Science (CFEL), Luruper Chaussee 149, 22761, Hamburg, Germany.
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4
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Lee S, Kim E, Bang J, Park J, Kim C, Wulferding D, Cho D. Melting of Unidirectional Charge Density Waves across Twin Domain Boundaries in GdTe 3. NANO LETTERS 2023. [PMID: 38019157 DOI: 10.1021/acs.nanolett.3c03721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Solids undergoing a transition from order to disorder experience a proliferation of topological defects. The melting process generates transient quantum states. However, their dynamic nature with a femtosecond lifetime hinders exploration with atomic precision. Here, we suggest an alternative approach to the dynamic melting process by focusing on the interface created by competing degenerate quantum states. We use a scanning tunneling microscope (STM) to visualize the unidirectional charge density wave (CDW) and its spatial progression ("static melting") across a twin domain boundary (TDB) in the layered material GdTe3. Combining the STM with a spatial lock-in technique, we reveal that the order parameter amplitude attenuates with the formation of dislocations and thus two different unidirectional CDWs coexist near the TDB, reducing the CDW anisotropy. Notably, we discovered a correlation between this anisotropy and the CDW gap. Our study provides valuable insight into the behavior of topological defects and transient quantum states.
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Affiliation(s)
- Sanghun Lee
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea
| | - Eunseo Kim
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea
| | - Junho Bang
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea
| | - Jongho Park
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Changyoung Kim
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Dirk Wulferding
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Doohee Cho
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea
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5
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Milloch A, Filippi U, Franceschini P, Galvani M, Mor S, Pagliara S, Ferrini G, Banfi F, Capone M, Baranov D, Manna L, Giannetti C. Halide Perovskite Artificial Solids as a New Platform to Simulate Collective Phenomena in Doped Mott Insulators. NANO LETTERS 2023; 23:10617-10624. [PMID: 37948635 PMCID: PMC10683068 DOI: 10.1021/acs.nanolett.3c03715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/06/2023] [Indexed: 11/12/2023]
Abstract
The development of quantum simulators, artificial platforms where the predictions of many-body theories of correlated quantum materials can be tested in a controllable and tunable way, is one of the main challenges of condensed matter physics. Here we introduce artificial lattices made of lead halide perovskite nanocubes as a new platform to simulate and investigate the physics of correlated quantum materials. We demonstrate that optical injection of quantum confined excitons in this system realizes the two main features that ubiquitously pervade the phase diagram of many quantum materials: collective phenomena, in which long-range orders emerge from incoherent fluctuations, and the excitonic Mott transition, which has one-to-one correspondence with the insulator-to-metal transition described by the repulsive Hubbard model in a magnetic field. Our results demonstrate that time-resolved experiments provide a quantum simulator that is able to span a parameter range relevant for a broad class of phenomena, such as superconductivity and charge-density waves.
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Affiliation(s)
- Alessandra Milloch
- Department
of Mathematics and Physics, Università
Cattolica del Sacro Cuore, Brescia I-25133, Italy
- ILAMP
(Interdisciplinary Laboratories for Advanced Materials Physics), Università Cattolica del Sacro Cuore, Brescia I-25133, Italy
- Department
of Physics and Astronomy, KU Leuven, B-3001 Leuven, Belgium
| | | | - Paolo Franceschini
- CNR-INO
(National Institute of Optics), via Branze 45, 25123 Brescia, Italy
- Department
of Information Engineering, University of
Brescia, Brescia I-25123, Italy
| | - Michele Galvani
- Department
of Mathematics and Physics, Università
Cattolica del Sacro Cuore, Brescia I-25133, Italy
| | - Selene Mor
- Department
of Mathematics and Physics, Università
Cattolica del Sacro Cuore, Brescia I-25133, Italy
- ILAMP
(Interdisciplinary Laboratories for Advanced Materials Physics), Università Cattolica del Sacro Cuore, Brescia I-25133, Italy
| | - Stefania Pagliara
- Department
of Mathematics and Physics, Università
Cattolica del Sacro Cuore, Brescia I-25133, Italy
- ILAMP
(Interdisciplinary Laboratories for Advanced Materials Physics), Università Cattolica del Sacro Cuore, Brescia I-25133, Italy
| | - Gabriele Ferrini
- Department
of Mathematics and Physics, Università
Cattolica del Sacro Cuore, Brescia I-25133, Italy
- ILAMP
(Interdisciplinary Laboratories for Advanced Materials Physics), Università Cattolica del Sacro Cuore, Brescia I-25133, Italy
| | - Francesco Banfi
- FemtoNanoOptics
group, Université de Lyon, CNRS, Université Claude Bernard
Lyon 1, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Massimo Capone
- International
School for Advanced Studies (SISSA), Trieste 34136, Italy
| | - Dmitry Baranov
- Italian
Institute of Technology (IIT), Genova 16163, Italy
- Division
of Chemical Physics, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Liberato Manna
- Italian
Institute of Technology (IIT), Genova 16163, Italy
| | - Claudio Giannetti
- Department
of Mathematics and Physics, Università
Cattolica del Sacro Cuore, Brescia I-25133, Italy
- ILAMP
(Interdisciplinary Laboratories for Advanced Materials Physics), Università Cattolica del Sacro Cuore, Brescia I-25133, Italy
- CNR-INO
(National Institute of Optics), via Branze 45, 25123 Brescia, Italy
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6
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Liu W, Liu H, Wang Z, Li S, Wang L, Luo J. Inverse Design of Light Manipulating Structural Phase Transition in Solids. J Phys Chem Lett 2023; 14:6647-6657. [PMID: 37462525 DOI: 10.1021/acs.jpclett.3c00576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
This Perspective focuses on recent advances in understanding ultrafast processes involved in photoinduced structural phase transitions and proposes a strategy for precise manipulation of such transitions. It has been demonstrated that photoexcited carriers occupying empty antibonding or bonding states generate atomic driving forces that lead to either stretching or shortening of associated bonds, which in turn induce collective and coherent motions of atoms and yield structural transitions. For instance, phase transitions in IrTe2 and VO2, and nonthermal melting in Si, can be explained by the occupation of specific local bonding or antibonding states during laser excitation. These cases reveal the electronic-orbital-selective nature of laser-induced structural transitions. Based on this understanding, we propose an inverse design protocol for achieving or preventing a target structural transition by controlling the related electron occupations with orbital-selective photoexcitation. Overall, this Perspective provides a comprehensive overview of recent advancements in dynamical structural control in solid materials.
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Affiliation(s)
- Wenhao Liu
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haowen Liu
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi Wang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Shushen Li
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Linwang Wang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Junwei Luo
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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7
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Duan S, Xia W, Huang C, Wang S, Gu L, Liu H, Xiang D, Qian D, Guo Y, Zhang W. Ultrafast Switching from the Charge Density Wave Phase to a Metastable Metallic State in 1T-TiSe_{2}. PHYSICAL REVIEW LETTERS 2023; 130:226501. [PMID: 37327423 DOI: 10.1103/physrevlett.130.226501] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/28/2023] [Accepted: 05/04/2023] [Indexed: 06/18/2023]
Abstract
The ultrafast electronic structures of the charge density wave material 1T-TiSe_{2} were investigated by high-resolution time- and angle-resolved photoemission spectroscopy. We found that the quasiparticle populations drove ultrafast electronic phase transitions in 1T-TiSe_{2} within 100 fs after photoexcitation, and a metastable metallic state, which was significantly different from the equilibrium normal phase, was evidenced far below the charge density wave transition temperature. Detailed time- and pump-fluence-dependent experiments revealed that the photoinduced metastable metallic state was a result of the halted motion of the atoms through the coherent electron-phonon coupling process, and the lifetime of this state was prolonged to picoseconds with the highest pump fluence used in this study. Ultrafast electronic dynamics were well captured by the time-dependent Ginzburg-Landau model. Our work demonstrates a mechanism for realizing novel electronic states by photoinducing coherent motion of atoms in the lattice.
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Affiliation(s)
- Shaofeng Duan
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Wei Xia
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Chaozhi Huang
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shichong Wang
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lingxiao Gu
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Haoran Liu
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Dao Xiang
- Key Laboratory for Laser Plasmas (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Dong Qian
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Yanfeng Guo
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Wentao Zhang
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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8
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Enhanced charge density wave with mobile superconducting vortices in La 1.885Sr 0.115CuO 4. Nat Commun 2023; 14:733. [PMID: 36759612 PMCID: PMC9911724 DOI: 10.1038/s41467-023-36203-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 01/17/2023] [Indexed: 02/11/2023] Open
Abstract
Superconductivity in the cuprates is found to be intertwined with charge and spin density waves. Determining the interactions between the different types of order is crucial for understanding these important materials. Here, we elucidate the role of the charge density wave (CDW) in the prototypical cuprate La1.885Sr0.115CuO4, by studying the effects of large magnetic fields (H) up to 24 Tesla. At low temperatures (T), the observed CDW peaks reveal two distinct regions in the material: a majority phase with short-range CDW coexisting with superconductivity, and a minority phase with longer-range CDW coexisting with static spin density wave (SDW). With increasing magnetic field, the CDW first grows smoothly in a manner similar to the SDW. However, at high fields we discover a sudden increase in the CDW amplitude upon entering the vortex-liquid state. Our results signify strong coupling of the CDW to mobile superconducting vortices and link enhanced CDW amplitude with local superconducting pairing across the H - T phase diagram.
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9
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Chitturi SR, Burdet NG, Nashed Y, Ratner D, Mishra A, Lane TJ, Seaberg M, Esposito V, Yoon CH, Dunne M, Turner JJ. A machine learning photon detection algorithm for coherent x-ray ultrafast fluctuation analysis. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2022; 9:054302. [PMID: 36276194 PMCID: PMC9583189 DOI: 10.1063/4.0000161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
X-ray free electron laser experiments have brought unique capabilities and opened new directions in research, such as creating new states of matter or directly measuring atomic motion. One such area is the ability to use finely spaced sets of coherent x-ray pulses to be compared after scattering from a dynamic system at different times. This enables the study of fluctuations in many-body quantum systems at the level of the ultrafast pulse durations, but this method has been limited to a select number of examples and required complex and advanced analytical tools. By applying a new methodology to this problem, we have made qualitative advances in three separate areas that will likely also find application to new fields. As compared to the "droplet-type" models, which typically are used to estimate the photon distributions on pixelated detectors to obtain the coherent x-ray speckle patterns, our algorithm achieves an order of magnitude speedup on CPU hardware and two orders of magnitude improvement on GPU hardware. We also find that it retains accuracy in low-contrast conditions, which is the typical regime for many experiments in structural dynamics. Finally, it can predict photon distributions in high average-intensity applications, a regime which up until now has not been accessible. Our artificial intelligence-assisted algorithm will enable a wider adoption of x-ray coherence spectroscopies, by both automating previously challenging analyses and enabling new experiments that were not otherwise feasible without the developments described in this work.
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Affiliation(s)
| | - Nicolas G. Burdet
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Youssef Nashed
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Daniel Ratner
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Aashwin Mishra
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - T. J. Lane
- Deutsches Elektronen-Synchrotron, Hamburg, Germany
| | - Matthew Seaberg
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Vincent Esposito
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Chun Hong Yoon
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Mike Dunne
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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