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Shang T, Gao A, Xiao D, Zhang Q, Rong X, Tang Z, Lin W, Lin T, Meng F, Li X, Wen Y, Wang X, Su D, Chen Z, Hu YS, Li H, Yu Q, Zhang Z, Wu L, Gu L, Zuo JM, Zhu Y, Chen L, Nan CW. An orbital strategy for regulating the Jahn-Teller effect. Natl Sci Rev 2024; 11:nwae255. [PMID: 39175595 PMCID: PMC11339606 DOI: 10.1093/nsr/nwae255] [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: 04/23/2024] [Revised: 06/26/2024] [Accepted: 07/23/2024] [Indexed: 08/24/2024] Open
Abstract
The Jahn-Teller effect (JTE) arising from lattice-electron coupling is a fascinating phenomenon that profoundly affects important physical properties in a number of transition-metal compounds. Controlling JT distortions and their corresponding electronic structures is highly desirable to tailor the functionalities of materials. Here, we propose a local coordinate strategy to regulate the JTE through quantifying occupancy in the [Formula: see text] and [Formula: see text] orbitals of Mn and scrutinizing the symmetries of the ligand oxygen atoms in MnO6 octahedra in LiMn2O4 and Li0.5Mn2O4. The effectiveness of such a strategy has been demonstrated by constructing P2-type NaLi x Mn1 - x O2 oxides with different Li/Mn ordering schemes. In addition, this strategy is also tenable for most 3d transition-metal compounds in spinel and perovskite frameworks, indicating the universality of local coordinate strategy and the tunability of the lattice-orbital coupling in transition-metal oxides. This work demonstrates a useful strategy to regulate JT distortion and provides useful guidelines for future design of functional materials with specific physical properties.
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Affiliation(s)
- Tongtong Shang
- State Key Laboratory of New Ceramics and Fine Processing, National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Ang Gao
- State Key Laboratory of New Ceramics and Fine Processing, National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Dongdong Xiao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan 523808, China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaohui Rong
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhexin Tang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Weiguang Lin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Ting Lin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Fanqi Meng
- State Key Laboratory of New Ceramics and Fine Processing, National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Xinyan Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yuren Wen
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xuefeng Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Dong Su
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhen Chen
- State Key Laboratory of New Ceramics and Fine Processing, National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Yong-Sheng Hu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Hong Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Qian Yu
- Department of Materials Science and Engineering, Center of Electron Microscopy and State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | - Ze Zhang
- Department of Materials Science and Engineering, Center of Electron Microscopy and State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | - Lijun Wu
- Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, New York, NY 11973, USA
| | - Lin Gu
- State Key Laboratory of New Ceramics and Fine Processing, National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Jian-Min Zuo
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL 61801, USA
| | - Yimei Zhu
- Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, New York, NY 11973, USA
| | - Liquan Chen
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Ce-Wen Nan
- State Key Laboratory of New Ceramics and Fine Processing, National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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2
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Boström HLB, Cairns AB, Chen M, Daisenberger D, Ridley CJ, Funnell NP. The pressure response of Jahn-Teller-distorted Prussian blue analogues. Chem Sci 2024; 15:3155-3164. [PMID: 38425511 PMCID: PMC10901509 DOI: 10.1039/d3sc06912e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 01/19/2024] [Indexed: 03/02/2024] Open
Abstract
Jahn-Teller (JT) distorted CuII-containing compounds often display interesting structural and functional behaviour upon compression. We use high-pressure X-ray and neutron diffraction to investigate four JT-distorted Prussian blue analogues: Cu[Co(CN)6]0.67, CuPt(CN)6, and ACuCo(CN)6 (A = Rb, Cs), where the first two were studied in both their hydrated and dehydrated forms. All compounds are less compressible than the JT-inactive MnII-based counterparts, indicating a coupling between the electronic and mechanical properties. The effect is particularly strong for Cu[Co(CN)6]0.67, where the local JT distortions are uncorrelated (so-called orbital disorder). This sample amorphises at 0.5 GPa when dehydrated. CuPt(CN)6 behaves similarly to the MnII-analogues, with phase transitions at around 1 GPa and low sensitivity to water. For ACuCo(CN)6, the JT distortions reduce the propensity for phase transitions, although RbCuCo(CN)6 transitions to a new phase (P2/m) around 3 GPa. Our results have a bearing on both the topical Prussian blue analogues and the wider field of flexible frameworks.
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Affiliation(s)
- Hanna L B Boström
- Max Planck Institute for Solid State Research Heisenbergstraße 1 D-70569 Stuttgart Germany
- Department of Materials and Environmental Chemistry, Stockholm University Svante Arrhenius väg 16C SE-106 91 Stockholm Sweden
- Wallenberg Initiative Materials Science for Sustainability, Department of Materials and Environmental Chemistry, Stockholm University SE-114 18 Stockholm Sweden
| | - Andrew B Cairns
- Department of Materials, Imperial College London, Royal School of Mines Exhibition Road SW7 2AZ London UK
- London Centre for Nanotechnology, Imperial College London SW7 2AZ London UK
| | - Muzi Chen
- Department of Materials, Imperial College London, Royal School of Mines Exhibition Road SW7 2AZ London UK
- London Centre for Nanotechnology, Imperial College London SW7 2AZ London UK
| | | | - Christopher J Ridley
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory Harwell Campus Didcot OX11 0QX UK
| | - Nicholas P Funnell
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory Harwell Campus Didcot OX11 0QX UK
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3
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Nagle-Cocco LAV, Dutton SE. Van Vleck analysis of angularly distorted octahedra using VanVleckCalculator. J Appl Crystallogr 2024; 57:20-33. [PMID: 38322718 PMCID: PMC10840309 DOI: 10.1107/s1600576723009925] [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: 08/02/2023] [Accepted: 11/15/2023] [Indexed: 02/08/2024] Open
Abstract
Van Vleck modes describe all possible displacements of octahedrally coordinated ligands about a core atom. They are a useful analytical tool for analysing the distortion of octahedra, particularly for first-order Jahn-Teller distortions, but determination of the Van Vleck modes of an octahedron is complicated by the presence of angular distortion of the octahedron. This problem is most commonly resolved by calculating the bond distortion modes (Q 2, Q 3) along the bond axes of the octahedron, disregarding the angular distortion and losing information on the octahedral shear modes (Q 4, Q 5 and Q 6) in the process. In this paper, the validity of assuming bond lengths to be orthogonal in order to calculate the Van Vleck modes is discussed, and a method is described for calculating Van Vleck modes without disregarding the angular distortion. A Python package for doing this, VanVleckCalculator, is introduced and some examples of its use are given. Finally, it is shown that octahedral shear and angular distortion are often, but not always, correlated, and a parameter η is proposed as the shear fraction. It is demonstrated that η can be used to predict whether the values will be correlated when varying a tuning parameter such as temperature or pressure.
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Affiliation(s)
- Liam. A. V. Nagle-Cocco
- Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Siân E. Dutton
- Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
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4
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Pradhan E, Zeng T. The Unified Hamiltonian Formalism of Spin-Orbit Jahn-Teller and Pseudo-Jahn-Teller Problems in All Axial Symmetries. J Chem Theory Comput 2023; 19:7776-7786. [PMID: 37847554 DOI: 10.1021/acs.jctc.3c00782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Spatial degeneracy of electronic states closely connects spin-orbit coupling and vibronic coupling, which together determine properties of materials, especially heavy element compounds. Accurate description of those materials entails accurate mathematical formulas for spin-orbit vibronic Hamiltonians. For the first time ever, we in this work derive the Hamiltonian formalism to describe all spin-orbit Jahn-Teller and pseudo-Jahn-Teller vibronic problems in all axial symmetries. The conventional one-electron approximation of spin-orbit coupling, which was the foundation of all previous studies in this field, is not involved in the present work. Actually, the present formalism is applicable to all time-reversal symmetric hermitian Hamiltonian that has a Rank-1 dependence on the spin operator, without any restriction on the type and the number of term symbols and vibrational modes.
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Affiliation(s)
- Ekadashi Pradhan
- Department of Chemistry, York University, Toronto, Ontario M3J1P3, Canada
| | - Tao Zeng
- Department of Chemistry, York University, Toronto, Ontario M3J1P3, Canada
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Cattermull J, Roth N, Cassidy SJ, Pasta M, Goodwin AL. K-Ion Slides in Prussian Blue Analogues. J Am Chem Soc 2023; 145:24249-24259. [PMID: 37879069 PMCID: PMC10636749 DOI: 10.1021/jacs.3c08751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/19/2023] [Accepted: 09/26/2023] [Indexed: 10/27/2023]
Abstract
We study the phenomenology of cooperative off-centering of K+ ions in potassiated Prussian blue analogues (PBAs). The principal distortion mechanism by which this off-centering occurs is termed a "K-ion slide", and its origin is shown to lie in the interaction between local electrostatic dipoles that couple through a combination of electrostatics and elastic strain. Using synchrotron powder X-ray diffraction measurements, we determine the crystal structures of a range of low-vacancy K2M[Fe(CN)6] PBAs (M = Ni, Co, Fe, Mn, Cd) and establish an empirical link between composition, temperature, and slide-distortion magnitude. Our results reflect the common underlying physics responsible for K-ion slides and their evolution with temperature and composition. Monte Carlo simulations driven by a simple model of dipolar interactions and strain coupling reproduce the general features of the experimental phase behavior. We discuss the implications of our study for optimizing the performance of PBA K-ion battery cathode materials and also its relevance to distortions in other, conceptually related, hybrid perovskites.
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Affiliation(s)
- John Cattermull
- Inorganic
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K.
- Department
of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
| | - Nikolaj Roth
- Inorganic
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K.
- iNANO, Aarhus, DK-8000 Denmark
| | - Simon J. Cassidy
- Inorganic
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K.
| | - Mauro Pasta
- Department
of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
| | - Andrew L. Goodwin
- Inorganic
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K.
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6
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Zvejnieks G, Mastrikov Y, Gryaznov D. Jahn-Teller distortion in Sr 2FeO 4: group-theoretical analysis and hybrid DFT calculations. Sci Rep 2023; 13:16446. [PMID: 37777629 PMCID: PMC10542785 DOI: 10.1038/s41598-023-43381-7] [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: 07/07/2023] [Accepted: 09/22/2023] [Indexed: 10/02/2023] Open
Abstract
We present theoretical justification for distorted Ruddlesden-Popper (RP) phases of the first-order by using hybrid density functional theory (DFT) calculations and group-theoretical analysis. We, thus, demonstrate the existence of the Jahn-Teller effect around an Fe[Formula: see text] ion in Sr[Formula: see text]FeO[Formula: see text]. On the calculation side, we have established a combination of Wu-Cohen (WC) exchange and Perdew-Wang (PW) correlation in a three-parameter functional WC3PW, giving the most accurate description of Sr[Formula: see text]FeO[Formula: see text] from the comparison of three hybrid DFT functionals. Self-consistently obtained Hartree-Fock exact exchange of 0.16 demonstrates consistent results with the experimental literature data. Importantly, we explain conditions for co-existing proper and pseudo-Jahn-Teller effects from the crystalline orbitals, symmetry-mode analysis and irreps products. Moreover, phonon frequency calculations support and confirm the results of symmetry-mode analysis. In particular, the symmetry-mode analysis identifies a dominating irreducible representation of the Jahn-Teller mode (X2+) and corresponding space group (SG) of ground state structure (SG Cmce model). Therefore, the usually suggested high-symmetry tetragonal crystal structure (SG I4/mmm model) is higher in energy by 121 meV/f.u. (equivalent to the Jahn-Teller stabilization energy) compared with the distorted low-symmetry structure (SG Cmce model). We also present diffraction patterns for the two crystal symmetries to discuss the differences. Therefore, our results shed light on the existence of low-symmetry RP phases and make possible direct comparisons with future experiments.
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Affiliation(s)
- Guntars Zvejnieks
- Institute of Solid State Physics, University of Latvia, Kengaraga Str. 8, Riga, 1063, Latvia.
| | - Yuri Mastrikov
- Institute of Solid State Physics, University of Latvia, Kengaraga Str. 8, Riga, 1063, Latvia
| | - Denis Gryaznov
- Institute of Solid State Physics, University of Latvia, Kengaraga Str. 8, Riga, 1063, Latvia.
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7
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Teh S, Jeng HT. Magnetoelastic and Magnetoelectric Coupling in Two-Dimensional Nitride MXenes: A Density Functional Theory Study. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2644. [PMID: 37836286 PMCID: PMC10574495 DOI: 10.3390/nano13192644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/22/2023] [Accepted: 09/23/2023] [Indexed: 10/15/2023]
Abstract
Two-dimensional multiferroic (2D) materials have garnered significant attention due to their potential in high-density, low-power multistate storage and spintronics applications. MXenes, a class of 2D transition metal carbides and nitrides, were first discovered in 2011, and have become the focus of research in various disciplines. Our study, utilizing first-principles calculations, examines the lattice structures, and electronic and magnetic properties of nitride MXenes with intrinsic band gaps, including V2NF2, V2NO2, Cr2NF2, Mo2NO2, Mo2NF2, and Mn2NO2. These nitride MXenes exhibit orbital ordering, and in some cases the orbital ordering induces magnetoelastic coupling or magnetoelectric coupling. Most notably, Cr2NF2 is a ferroelastic material with a spiral magnetic ordered phase, and the spiral magnetization propagation vector is coupled with the direction of ferroelastic strain. The ferroelectric phase can exist as an excited state in V2NO2, Cr2NF2, and Mo2NF2, with their magnetic order being coupled with polar displacements through orbital ordering. Our results also suggest that similar magnetoelectric coupling effects persist in the Janus MXenes V8N4O7F, Cr8N4F7O, and Mo8N4F7O. Remarkably, different phases of Mo8N4F7O, characterized by orbital ordering rearrangements, can be switched by applying external strain or an external electric field. Overall, our theoretical findings suggest that nitride MXenes hold promise as 2D multiferroic materials.
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Affiliation(s)
- Sukhito Teh
- Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Horng-Tay Jeng
- Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
- Physics Division, National Center for Theoretical Sciences, Taipei 10617, Taiwan
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8
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Liu M, Tang XY, Zhang Y, Ren J, Wang S, Wu SF, Mi JX, Huang YX. Strategy for a Rational Design of Deep-Ultraviolet Nonlinear Optical Materials from Zeolites. Inorg Chem 2023; 62:15527-15536. [PMID: 37696003 DOI: 10.1021/acs.inorgchem.3c02022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
Deep-ultraviolet (DUV) nonlinear optical (NLO) materials play a crucial role in cutting-edge laser technology. In order to solve the serious layered growth tendency of the sole commercial DUV NLO crystal KBe2BO3F2 (KBBF), developing alternative systems of compounds with bulk crystal habits has become an urgent task for practical applications. Herein, a novel strategy was developed by applying non-centrosymmetric (NCS) cancrinite (CAN)-type zincophosphates {Na6(OH)2(H2O)2}Cs2[ZnPO4]6 with bulk-crystal habits as the prototype to design new DUV NLO crystals. Two new anhydrous alkali zincophosphates, namely, {(Li6 -xNaxO)A2}[(ZnPO4)6] (A = Cs, Rb; x = 2-3) crystallizing in the NCS hexagonal space group P63 (no. 173) with a CAN-type framework, were successfully synthesized via a modified fluoro-solvo-hydrothermal method by applying triethylamine (TEA) and concentrated NaF solution as a co-solvent. Interestingly, the rigidity of the NCS CAN-type framework acting as the host ensures the non-centrosymmetry of the resulting new compounds. Meanwhile, the replacement of water molecules by guest cationic species in the channels or cages can greatly improve the thermal stability of the resultant crystal and tune its NLO properties. The synergetic effect of the host framework and the guest species makes the two compounds transparent down to the DUV region (<200 nm) and exhibit SHG effects. Therefore, the proposed rational design strategy of applying the known zeotype NCS frameworks as prototypes together with the modified fluoro-solvo-hydrothermal method opens a great avenue for highly effectively exploring new DUV NLO materials.
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Affiliation(s)
- Mingfeng Liu
- College of Materials, Xiamen University, Xiamen 361005, China
| | - Xia-Yan Tang
- College of Materials, Xiamen University, Xiamen 361005, China
| | - Yinggan Zhang
- College of Materials, Xiamen University, Xiamen 361005, China
| | - Jilin Ren
- College of Materials, Xiamen University, Xiamen 361005, China
| | - Shuaihua Wang
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Shao-Fan Wu
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Jin-Xiao Mi
- College of Materials, Xiamen University, Xiamen 361005, China
| | - Ya-Xi Huang
- College of Materials, Xiamen University, Xiamen 361005, China
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Zhou A, Guo C, Jiang J, Wang D, Wang X, Ali S, Li J, Xia W, Fu M, Sun W. The Pillar Effect of Large-Size Alkaline Ions on the Electrochemical Stability of Sodium Manganese Hexacyanoferrate for Sodium-Ion Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2304887. [PMID: 37632313 DOI: 10.1002/smll.202304887] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/06/2023] [Indexed: 08/27/2023]
Abstract
Sodium manganese hexacyanoferrate (NaMnHCF) is an attractive candidate as a cathode material for sodium-ion batteries due to its low cost and high energy density. However, its practical application is hindered by poor electrochemical stability caused by the Jahn-Teller effect of Mn and the unstable structure of NaMnHCF. Here, this paper aims to address this issue by introducing highly stable AMnHCF (where A = K, Rb, or Cs) through a facile method to composite with NaMnHCF. The findings reveal that all AMnHCFs have a "pillar effect" on the crystal structure of NaMnHCF. It is observed that the degree of pillar effect varies depending on the specific AMnHCF used. The less electrochemically inactive the alkaline ion is and the greater the degree of compositing with NaMnHCF, the more dramatic the pillar effect. KMnHCF shows limited pillar effect due to its rough composition with NaMnHCF and the loss of K+ upon (de)intercalation. RbMnHCF has lower electrochemical activity and can be better composited with NaMnHCF. On the other hand, CsMnHCF exhibits the strongest pillar effect due to the inactivation of Cs+ and the excellent coherent structure formed by CsMnHCF and NaMnHCF. This research provides a new perspective on stabilizing NaMnHCF with other alkaline elements.
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Affiliation(s)
- Aijun Zhou
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
- Yangtze Delta Region Institute Huzhou, University of Electronic Science and Technology of China, Huzhou, 313001, China
| | - Can Guo
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
- Yangtze Delta Region Institute Huzhou, University of Electronic Science and Technology of China, Huzhou, 313001, China
| | - Jicheng Jiang
- Yangtze Delta Region Institute Huzhou, University of Electronic Science and Technology of China, Huzhou, 313001, China
| | - Donghuang Wang
- Yangtze Delta Region Institute Huzhou, University of Electronic Science and Technology of China, Huzhou, 313001, China
| | - Xin Wang
- Yangtze Delta Region Institute Huzhou, University of Electronic Science and Technology of China, Huzhou, 313001, China
| | - Shamshad Ali
- Yangtze Delta Region Institute Huzhou, University of Electronic Science and Technology of China, Huzhou, 313001, China
| | - Jingze Li
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
- Yangtze Delta Region Institute Huzhou, University of Electronic Science and Technology of China, Huzhou, 313001, China
| | - Weiwei Xia
- School of Materials and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Beilin District, Xi'an, Shaanxi, 710072, P. R. China
| | - Maosen Fu
- School of Materials and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Beilin District, Xi'an, Shaanxi, 710072, P. R. China
| | - Wenwu Sun
- Thermo Fisher Scientific Co., Ltd., Shanghai China, Building A, China Core Technology Park, 2517 Jinke Road, Pudong New Area, Shanghai, 201203, China
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10
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Aamlid SS, Oudah M, Rottler J, Hallas AM. Understanding the Role of Entropy in High Entropy Oxides. J Am Chem Soc 2023; 145:5991-6006. [PMID: 36881986 DOI: 10.1021/jacs.2c11608] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
The field of high entropy oxides (HEOs) flips traditional materials science paradigms on their head by seeking to understand what properties arise in the presence of profound configurational disorder. This disorder, which originates from multiple elements sharing a single lattice site, can take on a kaleidoscopic character due to the vast numbers of possible elemental combinations. High configurational disorder appears to imbue some HEOs with functional properties that far surpass their nondisordered analogs. While experimental discoveries abound, efforts to characterize the true magnitude of the configurational entropy and understand its role in stabilizing new phases and generating superior functional properties have lagged behind. Understanding the role of configurational disorder in existing HEOs is the crucial link to unlocking the rational design of new HEOs with targeted properties. In this Perspective, we attempt to establish a framework for articulating and beginning to address these questions in pursuit of a deeper understanding of the true role of entropy in HEOs.
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Affiliation(s)
- Solveig S Aamlid
- Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Mohamed Oudah
- Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Jörg Rottler
- Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Department of Physics & Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Alannah M Hallas
- Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Department of Physics & Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
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11
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Kim WJ, Smeaton MA, Jia C, Goodge BH, Cho BG, Lee K, Osada M, Jost D, Ievlev AV, Moritz B, Kourkoutis LF, Devereaux TP, Hwang HY. Geometric frustration of Jahn-Teller order in the infinite-layer lattice. Nature 2023; 615:237-243. [PMID: 36813969 DOI: 10.1038/s41586-022-05681-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 12/22/2022] [Indexed: 02/24/2023]
Abstract
The Jahn-Teller effect, in which electronic configurations with energetically degenerate orbitals induce lattice distortions to lift this degeneracy, has a key role in many symmetry-lowering crystal deformations1. Lattices of Jahn-Teller ions can induce a cooperative distortion, as exemplified by LaMnO3 (refs. 2,3). Although many examples occur in octahedrally4 or tetrahedrally5 coordinated transition metal oxides due to their high orbital degeneracy, this effect has yet to be manifested for square-planar anion coordination, as found in infinite-layer copper6,7, nickel8,9, iron10,11 and manganese oxides12. Here we synthesize single-crystal CaCoO2 thin films by topotactic reduction of the brownmillerite CaCoO2.5 phase. We observe a markedly distorted infinite-layer structure, with ångström-scale displacements of the cations from their high-symmetry positions. This can be understood to originate from the Jahn-Teller degeneracy of the dxz and dyz orbitals in the d7 electronic configuration along with substantial ligand-transition metal mixing. A complex pattern of distortions arises in a [Formula: see text] tetragonal supercell, reflecting the competition between an ordered Jahn-Teller effect on the CoO2 sublattice and the geometric frustration of the associated displacements of the Ca sublattice, which are strongly coupled in the absence of apical oxygen. As a result of this competition, the CaCoO2 structure forms an extended two-in-two-out type of Co distortion following 'ice rules'13.
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Affiliation(s)
- Woo Jin Kim
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA. .,Department of Applied Physics, Stanford University, Stanford, CA, USA.
| | - Michelle A Smeaton
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, USA
| | - Chunjing Jia
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.,Department of Physics, University of Florida, Gainesville, FL, USA
| | - Berit H Goodge
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY, USA
| | - Byeong-Gwan Cho
- Pohang Accelerator Laboratory, POSTECH, Pohang, Republic of Korea
| | - Kyuho Lee
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.,Department of Physics, Stanford University, Stanford, CA, USA
| | - Motoki Osada
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.,Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Daniel Jost
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Anton V Ievlev
- Center for Nanophase Materials Sciences Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Brian Moritz
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Lena F Kourkoutis
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY, USA
| | - Thomas P Devereaux
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.,Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Harold Y Hwang
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA. .,Department of Applied Physics, Stanford University, Stanford, CA, USA.
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12
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AIO3∙H6TeO6 (A=NH4, Rb): Two Telluric Acid and Iodate Co-Crystalline Compounds with Second Harmonic Generation Response. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY 2023. [DOI: 10.1016/j.cjsc.2023.100025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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13
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Liang XX, Zhao XY, Guo A, Wang XW, Rong M, Chang L, Sun ZQ, Jin XD. Synthesis, crystal structure and antibacterial activity of zinc(II) complexes with Schiff bases derived from 5-fluorosalicylaldehyde. J COORD CHEM 2023. [DOI: 10.1080/00958972.2023.2170795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Xiao-Xue Liang
- College of Chemistry, Liaoning University, Shenyang, P.R. China
| | - Xin-Yu Zhao
- College of Chemistry, Liaoning University, Shenyang, P.R. China
| | - Ang Guo
- College of Chemistry, Liaoning University, Shenyang, P.R. China
| | - Xiao-Wen Wang
- College of Light Industry, Liaoning University, Shenyang, P.R. China
| | - Mei Rong
- College of Chemistry, Liaoning University, Shenyang, P.R. China
| | - Lin Chang
- College of Chemistry, Liaoning University, Shenyang, P.R. China
| | - Zhong-Qiao Sun
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, P.R. China
| | - Xu-Dong Jin
- College of Chemistry, Liaoning University, Shenyang, P.R. China
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14
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Cheng R, Yin L, Wen Y, Zhai B, Guo Y, Zhang Z, Liao W, Xiong W, Wang H, Yuan S, Jiang J, Liu C, He J. Ultrathin ferrite nanosheets for room-temperature two-dimensional magnetic semiconductors. Nat Commun 2022; 13:5241. [PMID: 36068242 PMCID: PMC9448765 DOI: 10.1038/s41467-022-33017-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 08/26/2022] [Indexed: 11/23/2022] Open
Abstract
The discovery of magnetism in ultrathin crystals opens up opportunities to explore new physics and to develop next-generation spintronic devices. Nevertheless, two-dimensional magnetic semiconductors with Curie temperatures higher than room temperature have rarely been reported. Ferrites with strongly correlated d-orbital electrons may be alternative candidates offering two-dimensional high-temperature magnetic ordering. This prospect is, however, hindered by their inherent three-dimensional bonded nature. Here, we develop a confined-van der Waals epitaxial approach to synthesizing air-stable semiconducting cobalt ferrite nanosheets with thickness down to one unit cell using a facile chemical vapor deposition process. The hard magnetic behavior and magnetic domain evolution are demonstrated by means of vibrating sample magnetometry, magnetic force microscopy and magneto-optical Kerr effect measurements, which shows high Curie temperature above 390 K and strong dimensionality effect. The addition of room-temperature magnetic semiconductors to two-dimensional material family provides possibilities for numerous novel applications in computing, sensing and information storage.
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Affiliation(s)
- Ruiqing Cheng
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Lei Yin
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Yao Wen
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Baoxing Zhai
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Yuzheng Guo
- School of Electrical Engineering and Automation, Wuhan University, Wuhan, 430072, China
| | - Zhaofu Zhang
- The Institute of Technological Sciences, Wuhan University, Wuhan, 430072, China
| | - Weitu Liao
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Wenqi Xiong
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Hao Wang
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Shengjun Yuan
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Jian Jiang
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Chuansheng Liu
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Jun He
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan, 430072, China.
- Wuhan Institute of Quantum Technology, Wuhan, 430206, China.
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15
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Hwang J, Jin Y, Zhang C, Zhu T, Kim K, Zhong Y, Lee JE, Shen Z, Chen Y, Ruan W, Ryu H, Hwang C, Lee J, Crommie MF, Mo SK, Shen ZX. A Novel 19 $\sqrt {19} $ × 19 $\sqrt {19} $ Superstructure in Epitaxially Grown 1T-TaTe 2. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2204579. [PMID: 35902365 DOI: 10.1002/adma.202204579] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/21/2022] [Indexed: 06/15/2023]
Abstract
The spontaneous formation of electronic orders is a crucial element for understanding complex quantum states and engineering heterostructures in 2D materials. A novel 19 $\sqrt {19} $ × 19 $\sqrt {19} $ charge order in few-layer-thick 1T-TaTe2 transition metal dichalcogenide films grown by molecular beam epitaxy, which has not been realized, is report. The photoemission and scanning probe measurements demonstrate that monolayer 1T-TaTe2 exhibits a variety of metastable charge density wave orders, including the 19 $\sqrt {19} $ × 19 $\sqrt {19} $ superstructure, which can be selectively stabilized by controlling the post-growth annealing temperature. Moreover, it is found that only the 19 $\sqrt {19} $ × 19 $\sqrt {19} $ order persists in 1T-TaTe2 films thicker than a monolayer, up to 8 layers. The findings identify the previously unrealized novel electronic order in a much-studied transition metal dichalcogenide and provide a viable route to control it within the epitaxial growth process.
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Affiliation(s)
- Jinwoong Hwang
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Department of Physics, Pusan National University, Busan, 46241, South Korea
| | - Yeongrok Jin
- Department of Physics, Pusan National University, Busan, 46241, South Korea
| | - Canxun Zhang
- Department of Physics, University of California, Berkeley, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Kavli Energy NanoScience Institute, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Tiancong Zhu
- Department of Physics, University of California, Berkeley, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Kyoo Kim
- Korea Atomic Energy Research Institute, Daejeon, 34057, South Korea
| | - Yong Zhong
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Ji-Eun Lee
- Department of Physics, Pusan National University, Busan, 46241, South Korea
| | - Zongqi Shen
- Department of Physics, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Yi Chen
- Department of Physics, University of California, Berkeley, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Wei Ruan
- Department of Physics, University of California, Berkeley, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Department of Physics, Fudan University, Fudan, 200433, China
| | - Hyejin Ryu
- Center for Spintronics, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Choongyu Hwang
- Department of Physics, Pusan National University, Busan, 46241, South Korea
- Quantum Matter Core-Facility, Pusan National University, Busan, 46241, South Korea
| | - Jaekwang Lee
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Department of Physics, Pusan National University, Busan, 46241, South Korea
- Center for Spintronics, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Michael F Crommie
- Department of Physics, University of California, Berkeley, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Kavli Energy NanoScience Institute, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Sung-Kwan Mo
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Zhi-Xun Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
- Geballe Laboratory for Advanced Materials, Department of Physics and Applied Physics, Stanford University, Menlo Park, CA, 94305, USA
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16
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Cattermull J, Sada K, Hurlbutt K, Cassidy SJ, Pasta M, Goodwin AL. Uncovering the Interplay of Competing Distortions in the Prussian Blue Analogue K 2Cu[Fe(CN) 6]. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:5000-5008. [PMID: 35722203 PMCID: PMC9202302 DOI: 10.1021/acs.chemmater.2c00288] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 05/05/2022] [Indexed: 06/15/2023]
Abstract
We report the synthesis, crystal structure, thermal response, and electrochemical behavior of the Prussian blue analogue (PBA) K2Cu[Fe(CN)6]. From a structural perspective, this is the most complex PBA yet characterized: its triclinic crystal structure results from an interplay of cooperative Jahn-Teller order, octahedral tilts, and a collective "slide" distortion involving K-ion displacements. These different distortions give rise to two crystallographically distinct K-ion channels with different mobilities. Variable-temperature X-ray powder diffraction measurements show that K-ion slides are the lowest-energy distortion mechanism at play, as they are the only distortion to be switched off with increasing temperature. Electrochemically, the material operates as a K-ion cathode with a high operating voltage and an improved initial capacity relative to higher-vacancy PBA alternatives. On charging, K+ ions are selectively removed from a single K-ion channel type, and the slide distortions are again switched on and off accordingly. We discuss the functional importance of various aspects of structural complexity in this system, placing our discussion in the context of other related PBAs.
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Affiliation(s)
- John Cattermull
- Department
of Chemistry, University of Oxford, Inorganic
Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, U.K.
- Department
of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
| | - Krishnakanth Sada
- Department
of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
| | - Kevin Hurlbutt
- Department
of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
| | - Simon J. Cassidy
- Department
of Chemistry, University of Oxford, Inorganic
Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, U.K.
| | - Mauro Pasta
- Department
of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
| | - Andrew L. Goodwin
- Department
of Chemistry, University of Oxford, Inorganic
Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, U.K.
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17
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Pradhan E, Yao G, Yang Z, Zeng T. Unified one-electron Hamiltonian formalism of spin-orbit Jahn-Teller and pseudo-Jahn-Teller problems in tetrahedral and octahedral symmetries. J Chem Phys 2022; 157:064104. [DOI: 10.1063/5.0090053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Heavy element compounds with high symmetries often feature both spin-orbit coupling and vibronic coupling. This is especially true for systems with tetrahedral and octahedral symmetries, whose electronic states may be three-fold degenerate and experience complicated Jahn-Teller and pseudo-Jahn-Teller interactions. To accurately describe these interactions, high quality spin-orbit vibronic Hamiltonian operators are needed. In this study, we present a unified one-electron Hamiltonian formalism for spin-orbit vibronic interactions for systems in all tetrahedral and octahedral symmetries. The formalism covers all spin-orbit Jahn-Teller and pseudo-Jahn-Teller problems in the symmetries with arbitrary types and arbitrary numbers of vibrational modes, and generates Hamiltonian expansion formulas of arbitrarily high order.
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Affiliation(s)
| | | | | | - Tao Zeng
- Department of Chemistry, York University, Canada
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18
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Moore K, O’Connell EN, Griffin SM, Downing C, Colfer L, Schmidt M, Nicolosi V, Bangert U, Keeney L, Conroy M. Charged Domain Wall and Polar Vortex Topologies in a Room-Temperature Magnetoelectric Multiferroic Thin Film. ACS APPLIED MATERIALS & INTERFACES 2022; 14:5525-5536. [PMID: 35044754 PMCID: PMC8815039 DOI: 10.1021/acsami.1c17383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 01/09/2022] [Indexed: 06/14/2023]
Abstract
Multiferroic topologies are an emerging solution for future low-power magnetic nanoelectronics due to their combined tuneable functionality and mobility. Here, we show that in addition to being magnetoelectric multiferroic at room temperature, thin-film Aurivillius phase Bi6TixFeyMnzO18 is an ideal material platform for both domain wall and vortex topology-based nanoelectronic devices. Utilizing atomic-resolution electron microscopy, we reveal the presence and structure of 180°-type charged head-to-head and tail-to-tail domain walls passing throughout the thin film. Theoretical calculations confirm the subunit cell cation site preference and charged domain wall energetics for Bi6TixFeyMnzO18. Finally, we show that polar vortex-type topologies also form at out-of-phase boundaries of stacking faults when internal strain and electrostatic energy gradients are altered. This study could pave the way for controlled polar vortex topology formation via strain engineering in other multiferroic thin films. Moreover, these results confirm that the subunit cell topological features play an important role in controlling the charge and spin state of Aurivillius phase films and other multiferroic heterostructures.
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Affiliation(s)
- Kalani Moore
- Department
of Physics, Bernal Institute, School of Natural Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Eoghan N. O’Connell
- Department
of Physics, Bernal Institute, School of Natural Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Sinéad M. Griffin
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Molecular
Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Clive Downing
- Advanced
Microscopy Laboratory & AMBER, Trinity
College Dublin, Dublin D02 PN40, Ireland
| | - Louise Colfer
- Tyndall
National Institute, University College Cork, Cork T12 R5CP, Ireland
| | - Michael Schmidt
- Tyndall
National Institute, University College Cork, Cork T12 R5CP, Ireland
| | - Valeria Nicolosi
- Advanced
Microscopy Laboratory & AMBER, Trinity
College Dublin, Dublin D02 PN40, Ireland
- School of
Chemistry, Trinity College Dublin, Dublin D02 PN40, Ireland
| | - Ursel Bangert
- Department
of Physics, Bernal Institute, School of Natural Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Lynette Keeney
- Tyndall
National Institute, University College Cork, Cork T12 R5CP, Ireland
| | - Michele Conroy
- Department
of Physics, Bernal Institute, School of Natural Sciences, University of Limerick, Limerick V94 T9PX, Ireland
- Department
of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, U.K.
- London
Centre for Nanotechnology, Imperial College
London, Exhibition Road, London SW7 2AZ, U.K.
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19
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Brown J, Pradhan E, Zeng T. Unified one-electron Hamiltonian formalism of spin-orbit Jahn-Teller and pseudo-Jahn-Teller problems in axial symmetries. J Chem Phys 2021; 155:224108. [PMID: 34911326 DOI: 10.1063/5.0068044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Spin-orbit coupling and vibronic coupling are both closely related to orbital degeneracy of electronic states. Both types of coupling play significant roles in determining properties of heavy element compounds and shall be treated on the same footing. In this work, we derive a unified one-electron Hamiltonian formalism for spin-orbit and vibronic interactions for systems in all axial symmetries. The one-electron formalism is usually adequate as the spin-orbit interaction can often be approximated as a one-electron interaction. For the first time, the formalism covers spin-orbit and vibronic couplings in all axial symmetries from C1 to D∞h, arbitrary types of vibrational modes in those symmetries, and an arbitrary number of those modes and gives Hamiltonian expansions up to an arbitrary order.
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Affiliation(s)
- James Brown
- Department of Chemistry, York University, Toronto, Ontario M3J1P3, Canada
| | - Ekadashi Pradhan
- Department of Chemistry, York University, Toronto, Ontario M3J1P3, Canada
| | - Tao Zeng
- Department of Chemistry, York University, Toronto, Ontario M3J1P3, Canada
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20
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Kong F, Jiang TK, Mao JG. Role of fluorine on the structure and second-harmonic-generation property of inorganic selenites and tellurites. Chem Commun (Camb) 2021; 57:12575-12586. [PMID: 34747417 DOI: 10.1039/d1cc04818j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorine, as the most electronegative element, can replace the oxygen ligands of functional groups under given conditions. These fluoride groups are more or less different from the pure oxide groups in composition, symmetry, polarizability, transmittancy, etc. The rational use of these differences is expected to improve the probability of noncentrosymmetric structures and the comprehensive performance of second-harmonic-generation (SHG) materials. In this feature article, we introduce the recent developments in fluoride selenite and tellurite SHG materials together with highlighting our contributions, including Se(IV) and Te(IV) compounds with (i) d0 transition metal oxyfluoride octahedron, (ii) IIIA metal oxyfluoride octahedron, (iii) fluoride lone pair cation polyhedron, and (iv) other fluoride polyhedron. The future perspectives of fluoride selenite and tellurite SHG materials are also discussed.
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Affiliation(s)
- Fang Kong
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China. .,University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Ting-Kun Jiang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China. .,College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Jiang-Gao Mao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China.
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21
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Yu H, Walsh M, Liang X. Improving the Comprehensive Performance of Na 0.7MnO 2 for Sodium Ion Batteries by ZrO 2 Atomic Layer Deposition. ACS APPLIED MATERIALS & INTERFACES 2021; 13:54884-54893. [PMID: 34761895 DOI: 10.1021/acsami.1c13543] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Sodium ion batteries with Na-Mn-O compounds as cathodes have been widely studied as substitutes for lithium ion batteries due to their abundant resources. However, the relatively poor cycling stability and low capacity of Na-Mn-O compounds significantly limit their applications. Different approaches, including element substitution and surface modification, have been applied to improve the electrochemical performance of those cathode materials. Herein, element doping and coating of ZrO2 on Na0.7MnO2 particles have been achieved by atomic layer deposition followed by post-annealing. The rate capability and cycling stability of the modified materials were significantly improved, and the mechanism of performance enhancement was revealed. The ZrO2 coatings acted as a stable interfacial layer to enhance the cycling stability of Na0.7MnO2 by suppressing side reactions between the electrode and electrolyte. The doping of transition metal ions reduced energy barriers for sodium ion insertion and deintercalation during charge/discharge cycling, further improving the charge/discharge capacity and rate performance of Na0.7MnO2.
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Affiliation(s)
- Han Yu
- Linda and Bipin Doshi Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Michael Walsh
- Kansas City National Security Campus Managed By Honeywell, Kansas City, Missouri 64147, United States
| | - Xinhua Liang
- Linda and Bipin Doshi Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
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22
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Biz C, Fianchini M, Gracia J. Strongly Correlated Electrons in Catalysis: Focus on Quantum Exchange. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03135] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Chiara Biz
- MagnetoCat SL, General Polavieja 9 3I, 03012 Alicante, Spain
- Universitat Jaume I, Av. Vicente Sos Baynat s/n, E-12071 Castellón de la Plana, Spain
| | - Mauro Fianchini
- MagnetoCat SL, General Polavieja 9 3I, 03012 Alicante, Spain
| | - Jose Gracia
- MagnetoCat SL, General Polavieja 9 3I, 03012 Alicante, Spain
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23
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Klepov VV, Pace KA, Berseneva AA, Felder JB, Calder S, Morrison G, Zhang Q, Kirkham MJ, Parker DS, Zur Loye HC. Chloride Reduction of Mn 3+ in Mild Hydrothermal Synthesis of a Charge Ordered Defect Pyrochlore, CsMn 2+Mn 3+F 6, a Canted Antiferromagnet with a Hard Ferromagnetic Component. J Am Chem Soc 2021; 143:11554-11567. [PMID: 34310146 DOI: 10.1021/jacs.1c04245] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Geometrically frustrated systems play an important role in studying new physical phenomena and unconventional thermodynamics. Charge ordered defect pyrochlores AM2+M3+F6 offer a convenient platform for probing the interplay between electron distribution over M2+ and M3+ sites and structural distortions; however, they are limited to compounds with M2+/3+ = V, Fe, Ni, and Cu due to difficulties in the simultaneous stabilization of other 3d elements in the +2 and +3 oxidation states. Herein, we employ Cl- anions under hydrothermal conditions for the mild reduction of Mn2O3 in concentrated HF to obtain the CsMn2+Mn3+F6 composition as a phase pure sample and study its properties. The magnetism of CsMn2F6 was characterized by measuring the magnetic susceptibility and isothermal magnetization data, and a magnetic transition to a canted antiferromagnet state was found at 24.1 K. We determined the magnetic structure of CsMn2F6 using powder neutron diffraction, which revealed successive long-range ordering of the Mn2+ and Mn3+ sites that is accompanied by a second transition. The role and strength of magnetic exchange interactions were characterized using DFT calculations.
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Affiliation(s)
- Vladislav V Klepov
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Kristen A Pace
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Anna A Berseneva
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | | | | | - Gregory Morrison
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | | | | | | | - Hans-Conrad Zur Loye
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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24
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Brown J, Lang RA, Zeng T. Unified Hamiltonian Formalism of Jahn-Teller and Pseudo-Jahn-Teller Problems in Axial Symmetries. J Chem Theory Comput 2021; 17:4392-4402. [PMID: 34110818 DOI: 10.1021/acs.jctc.1c00419] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A formalism for expansions of all Jahn-Teller and pseudo-Jahn-Teller Hamiltonian operators in all axial symmetries is presented. The formalism provides Hamiltonian expansions up to arbitrarily high order and including an arbitrary number of vibrational modes, which are of arbitrary types. It consists of three equations and two tables. The formalism is user-friendly since it can be used without understanding its derivation. An example of E3″⊗e1' Jahn-Teller interaction is used to demonstrate the correctness of the formalism. A Python program is developed to automate the generation of Hamiltonian expansions for all axial Jahn-Teller and pseodo-Jahn-Teller problems and interface the expansions to the MCTDH quantum dynamics simulation program. This is the first unified Hamiltonian formalism for axial Jahn-Teller and pseudo-Jahn-Teller problems. Also it is the only one.
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Affiliation(s)
- James Brown
- Department of Chemistry, York University, Toronto, Ontario M3J1P3, Canada
| | - Robert A Lang
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario M1C 1A4, Canada.,Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Tao Zeng
- Department of Chemistry, York University, Toronto, Ontario M3J1P3, Canada
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25
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Local electronic structure rearrangements and strong anharmonicity in YH 3 under pressures up to 180 GPa. Nat Commun 2021; 12:1765. [PMID: 33741970 PMCID: PMC7979761 DOI: 10.1038/s41467-021-21991-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 02/17/2021] [Indexed: 01/31/2023] Open
Abstract
The discovery of superconductivity above 250 K at high pressure in LaH10 and the prediction of overcoming the room temperature threshold for superconductivity in YH10 urge for a better understanding of hydrogen interaction mechanisms with the heavy atom sublattice in metal hydrides under high pressure at the atomic scale. Here we use locally sensitive X-ray absorption fine structure spectroscopy (XAFS) to get insight into the nature of phase transitions and the rearrangements of local electronic and crystal structure in archetypal metal hydride YH3 under pressure up to 180 GPa. The combination of the experimental methods allowed us to implement a multiscale length study of YH3: XAFS (short-range), Raman scattering (medium-range) and XRD (long-range). XANES data evidence a strong effect of hydrogen on the density of 4d yttrium states that increases with pressure and EXAFS data evidence a strong anharmonicity, manifested as yttrium atom vibrations in a double-well potential.
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26
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Sharma S, Shanbhag PN, Orlandi F, Manuel P, Langridge S, Adroja D, Sanyal MK, Sundaresan A. Symmetry Origin of the Dzyaloshinskii-Moriya Interaction and Magnetization Reversal in YVO 3. Inorg Chem 2021; 60:2195-2202. [PMID: 33492967 DOI: 10.1021/acs.inorgchem.0c02845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have investigated magneto-structural phase transitions in polycrystalline YVO3 using high-resolution neutron powder diffraction toward understanding the phenomenon of magnetization reversal. Contrary to earlier reports, our study reveals that both C-type and G-type antiferromagnetic ordering, corresponding to G-type and C-type orbital ordered phases, respectively, occur at the same temperature (TN = 115 K) with the G-type antiferromagnetic phase growing at the expense of the C-type one on cooling. These processes cease at TS ∼ 77 K; however, a minor (∼4%) untransformed C-type phase remains unchanged down to 1.7 K. The symmetry analysis indicates different symmetry origins of the Dzyaloshinskii-Moriya interaction in each phase, which can explain the magnetization reversal observed between TN and TS. We discuss that magnetic phase separation and associated weak ferromagnetism may be the common mechanism underlying the magnetization reversal phenomenon observed in other RVO3 systems (R = rare earth).
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Affiliation(s)
- Shivani Sharma
- School of Advanced Materials and Chemistry and Physics of Materials Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India.,ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U.K
| | - Pavitra N Shanbhag
- School of Advanced Materials and Chemistry and Physics of Materials Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India
| | - Fabio Orlandi
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U.K
| | - Pascal Manuel
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U.K
| | - Sean Langridge
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U.K
| | - Devashibhai Adroja
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U.K.,Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, Auckland Park 2006, South Africa
| | - Milan K Sanyal
- Saha Institute of Nuclear Physics, Bidhannagar, Kolkata 700064, India
| | - Athinarayanan Sundaresan
- School of Advanced Materials and Chemistry and Physics of Materials Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India
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27
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Abe S, Takagi M, Iwasaki S, Munakata F. Structural and transport properties of Ni- and Ti-doped lithium manganese spinels. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2020.121863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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28
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Bersuker IB. Jahn–Teller and Pseudo-Jahn–Teller Effects: From Particular Features to General Tools in Exploring Molecular and Solid State Properties. Chem Rev 2020; 121:1463-1512. [DOI: 10.1021/acs.chemrev.0c00718] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Isaac B. Bersuker
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
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29
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Yaghoobnejad Asl H, Manthiram A. Proton-Induced Disproportionation of Jahn-Teller-Active Transition-Metal Ions in Oxides Due to Electronically Driven Lattice Instability. J Am Chem Soc 2020; 142:21122-21130. [PMID: 33284616 DOI: 10.1021/jacs.0c10044] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The interfacial chemical reactivity of Jahn-Teller-active transition-metal oxides remains an enigmatic area, often leading to uncontrollable phase transformations in the oxide-based technological applications. In particular, the higher tendency of unwanted transition-metal-ion dissolution and side-reactions in Jahn-Teller-active oxides is accompanied by performance degradation in many electrochemical systems, for example, lithium-ion batteries. We show here that the fundamental electronic structure instability that leads to Jahn-Teller (lattice) distortion in an octahedral ligand field is the active chemical driving force for the spontaneous disproportionation, phase transformation, and metal-ion dissolution in transition-metal oxides upon exposure to protons. On the basis of electronic structure analyses and 18O isotope labeling, we present a mechanism comprising a coupled acid-base/redox reaction that leads to a proton-induced disproportionation of Jahn-Teller-active transition-metal ions, as exemplified by the broad classes of respective oxides.
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Affiliation(s)
- Hooman Yaghoobnejad Asl
- Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, United States
| | - Arumugam Manthiram
- Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, United States
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30
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Simonov A, Goodwin AL. Designing disorder into crystalline materials. Nat Rev Chem 2020; 4:657-673. [PMID: 37127977 DOI: 10.1038/s41570-020-00228-3] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/15/2020] [Indexed: 01/21/2023]
Abstract
Crystals are a state of matter characterized by periodic order. Yet, crystalline materials can harbour disorder in many guises, such as non-repeating variations in composition, atom displacements, bonding arrangements, molecular orientations, conformations, charge states, orbital occupancies or magnetic structure. Disorder can sometimes be random but, more usually, it is correlated. Frontier research into disordered crystals now seeks to control and exploit the unusual patterns that persist within these correlated disordered states in order to access functional responses inaccessible to conventional crystals. In this Review, we survey the core design principles that guide targeted control over correlated disorder. We show how these principles - often informed by long-studied statistical mechanical models - can be applied across an unexpectedly broad range of materials, including organics, supramolecular assemblies, oxide ceramics and metal-organic frameworks. We conclude with a forward-looking discussion of the exciting link between disorder and function in responsive media, thermoelectrics and topological phases.
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31
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Electronic parameters in cobalt-based perovskite-type oxides as descriptors for chemocatalytic reactions. Nat Commun 2020; 11:652. [PMID: 32005805 PMCID: PMC6994687 DOI: 10.1038/s41467-020-14305-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 12/18/2019] [Indexed: 11/12/2022] Open
Abstract
Perovskite-type transition metal (TM) oxides are effective catalysts in oxidation and decomposition reactions. Yet, the effect of compositional variation on catalytic efficacy is not well understood. The present analysis of electronic characteristics of B-site substituted LaCoO3 derivatives via in situ X-ray absorption spectroscopy (XAS) establishes correlations of electronic parameters with reaction rates: TM t2g and eg orbital occupancy yield volcano-type or non-linear correlations with NO oxidation, CO oxidation and N2O decomposition rates. Covalent O 2p-TM 3d interaction, in ultra-high vacuum, is a linear descriptor for reaction rates in NO oxidation and CO oxidation, and for N2O decomposition rates in O2 presence. Covalency crucially determines the ability of the catalytically active sites to interact with surface species during the kinetically relevant step of the reaction. The nature of the kinetically relevant step and of surface species involved lead to the vast effect of XAS measurement conditions on the validity of correlations. Design of efficient catalysts requires understanding the decisive electronic parameters for catalytic efficacy and their dependence on elemental composition. Here, the authors report covalency as suitable descriptor of perovskite-type transition metal oxides as chemo-catalysts.
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32
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Selb E, Declara L, Bayarjargal L, Podewitz M, Tribus M, Heymann G. Crystal Structure and Properties of a UV-Transparent High-Pressure Polymorph of Mg3
TeO6
with Second Harmonic Generation Response. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900998] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Elisabeth Selb
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
| | - Lisa Declara
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
| | - Lkhamsuren Bayarjargal
- Institut für Geowissenschaften; Universität Frankfurt; Altenhöferallee 1 60438 Frankfurt/Main Germany
| | - Maren Podewitz
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
| | - Martina Tribus
- Institut für Mineralogie und Petrographie; Leopold-Franzens-Universität Innsbruck; Innrain 52 6020 Innsbruck Austria
| | - Gunter Heymann
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
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33
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Jiang X, Ling C, Chen X, Chen S. Determination of the Zn Content in Zincian Malachite by X-ray Diffraction. ANAL LETT 2019. [DOI: 10.1080/00032719.2019.1684934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Xin Jiang
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China
| | - Chen Ling
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China
| | - Xinchao Chen
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China
| | - Shuaishuai Chen
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China
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34
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Singh B, Kumar S, Kumar P. Broken translational and rotational symmetries in LiMn 1.5Ni 0.5O 4 spinel. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:395701. [PMID: 31226706 DOI: 10.1088/1361-648x/ab2bdb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In condensed matter physics broken symmetries and emergence of quasi-particles are intimately linked to each other. Whenever a symmetry is broken, it leaves its fingerprints, and that may be observed indirectly via its influence on the other quasi-particles. Here, we report the strong signature of broken spin rotational symmetry induced due to long range-ordering of spins in Mn - sublattice of LiMn1.5Ni0.5O4 below T c ~ 113 K reflected with the marked changes in the lattice vibrations using Raman scattering. In particular, the majority of the observed first-order phonon modes show a sharp shift in frequency in the vicinity of long range magnetic-ordering temperature. Phonons exist in a crystalline system because of broken translational symmetry, therefore any renormalization in the phonon-spectrum could be a good gauge for broken translational symmetry. Anomalous evolution of the few modes associated with stretching of Mn/NiO6 octahedra in the intermediate temperature range (~60-260 K) marked the broken translational symmetry attributed to the charge ordering. Interestingly same modes also show strong coupling with magnetic degrees of freedom, suggesting that charge-ordering and magnetic transition may be linked to each other.
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Affiliation(s)
- Birender Singh
- School of Basic Sciences, Indian Institute of Technology Mandi, Mandi 175005, India
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35
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Chen L, Xu C, Tian H, Xiang H, Íñiguez J, Yang Y, Bellaiche L. Electric-Field Control of Magnetization, Jahn-Teller Distortion, and Orbital Ordering in Ferroelectric Ferromagnets. PHYSICAL REVIEW LETTERS 2019; 122:247701. [PMID: 31322382 DOI: 10.1103/physrevlett.122.247701] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 04/19/2019] [Indexed: 06/10/2023]
Abstract
Controlling the direction of the magnetization by an electric field in multiferroics that are both ferroelectric and strongly ferromagnetic will open the door to the design of the next generation of spintronics and memory devices. Using first-principles simulations, we report that the discovery that the PbTiO_{3}/LaTiO_{3} (PTO/LTO) superlattice possesses such highly desired control, as evidenced by the electric-field-induced rotation of 90° and even a possible full reversal of its magnetization in some cases. Moreover, such systems also exhibit Jahn-Teller distortions, as well as orbital orderings, that are switchable by the electric field, therefore making PTO/LTO of importance for the tuning of electronic properties too. The origin for such striking electric-field controls of magnetization, Jahn-Teller deformations, and orbital orderings resides in the existence of three different types of energetic coupling: one coupling polarization with antiphase and in-phase oxygen octahedral tiltings, a second one coupling polarization with antiphase oxygen octahedra tilting and Jahn-Teller distortions, and finally a biquadratic coupling between antiphase oxygen octahedral tilting and magnetization.
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Affiliation(s)
- Lan Chen
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
- National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China
- Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
| | - Changsong Xu
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - Hao Tian
- National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China
- Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
| | - Hongjun Xiang
- Key Laboratory of Computational Physical Sciences (Ministry of Education), State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai, 200433, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Jorge Íñiguez
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology, 5 avenue des Hauts-Fourneaux, L-4362 Esch/Alzette, Luxembourg
- Physics and Materials Science Research Unit, University of Luxembourg, 41 Rue du Brill, L-4422 Belvaux, Luxembourg
| | - Yurong Yang
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
- National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China
- Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - L Bellaiche
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
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36
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Mattsson S, Paulus B. Density Functional Theory Calculations of Structural, Electronic, and Magnetic Properties of the 3d Metal Trifluorides MF 3 (M = Ti-Ni) in the Solid State. J Comput Chem 2019; 40:1190-1197. [PMID: 30697774 DOI: 10.1002/jcc.25777] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/19/2018] [Accepted: 12/22/2018] [Indexed: 11/05/2022]
Abstract
We employ density functional theory with Hubbard U correction or hybrid functionals to study the series of magnetic 3d metal trifluorides MF3 (M = Ti-Ni). Experimental lattice parameters are reproduced with an error margin of 0.5%-4.3%. Cooperative Jahn-Teller distortions are reproduced for MnF3 , but also found in TiF3 and CoF3 at smaller levels compared to MnF3 . Trends in electronic structure with respect to positions of the d bands are linked to the magnetic properties where M = Ti-Cr are weak magnetic Mott-Hubbard insulators, M = Fe-Ni are strong magnetic charge-transfer insulators and MnF3 falls in between. Our work contributes to the characterization of the relatively unknown NiF3 , since FeF3 and CoF3 have similar electronic and magnetic properties. However, NiF3 does not show a Jahn-Teller distortion as present in CoF3 . © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Stefan Mattsson
- Institute of Chemistry and Biochemistry, Physical and Theoretical Chemistry, Freie Universität Berlin, Takustr. 3, 14195, Berlin, Germany
| | - Beate Paulus
- Institute of Chemistry and Biochemistry, Physical and Theoretical Chemistry, Freie Universität Berlin, Takustr. 3, 14195, Berlin, Germany
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37
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Wang K, Zeng T. Hamiltonian formalism of spin–orbit Jahn–Teller and pseudo-Jahn–Teller problems in trigonal and tetragonal symmetries. Phys Chem Chem Phys 2019; 21:18939-18957. [DOI: 10.1039/c9cp03584b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A formalism for expansions of all bimodal spin–orbit Jahn–Teller and pseudo-Jahn–Teller Hamiltonian operators in trigonal and tetragonal symmetries is presented.
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Affiliation(s)
- Kun Wang
- Department of Chemistry
- York University
- Toronto
- Canada
- Department of Chemistry
| | - Tao Zeng
- Department of Chemistry
- York University
- Toronto
- Canada
- Department of Chemistry
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38
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Shoji M, Isobe H, Yamanaka S, Umena Y, Kawakami K, Kamiya N, Yamaguchi K. Theoretical Elucidation of Geometrical Structures of the CaMn4O5 Cluster in Oxygen Evolving Complex of Photosystem II Scope and Applicability of Estimation Formulae of Structural Deformations via the Mixed-Valence and Jahn–Teller Effects. ADVANCES IN QUANTUM CHEMISTRY 2019. [DOI: 10.1016/bs.aiq.2018.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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39
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Neukirch AJ, Abate II, Zhou L, Nie W, Tsai H, Pedesseau L, Even J, Crochet JJ, Mohite AD, Katan C, Tretiak S. Geometry Distortion and Small Polaron Binding Energy Changes with Ionic Substitution in Halide Perovskites. J Phys Chem Lett 2018; 9:7130-7136. [PMID: 30523689 DOI: 10.1021/acs.jpclett.8b03343] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Halide perovskites have demonstrated remarkable performance in optoelectronic applications. Despite extraordinary progress, questions remain about device stability. We report an in-depth computational study of small polaron formation, electronic structure, charge density, and reorganization energies of several experimentally relevant halide perovskites using isolated clusters. Local lattice symmetry, electronic structure, and electron-phonon coupling are interrelated in polaron formation in these materials. To illustrate this, first-principles calculations are performed on (MA/Cs/FA)Pb(I/Br)3 and MASnI3. Across the materials studied, electron small polaron formation is manifested by Jahn-Teller-like distortions in the central octahedron, with apical PbI bonds expanding significantly more than the equatorial bonds. In contrast, hole polarons cause the central octahedron to uniformly contract. This difference in manifestation of electron and hole polaron formation can be a tool to determine what is taking place in individual systems to systematically control performance. Other trends as the anion and cations are changed are established for optimization in specific optoelectronic applications.
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Affiliation(s)
- Amanda J Neukirch
- Theoretical Physics and Chemistry of Materials , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Iwnetim I Abate
- Department of Materials Science and Engineering , Stanford University , Stanford , California 94305 , United States
- Stanford Institute for Materials and Energy Sciences , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States
| | - Liujiang Zhou
- Theoretical Physics and Chemistry of Materials , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Wanyi Nie
- Materials Physics and Application , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Hsinhan Tsai
- Materials Physics and Application , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Laurent Pedesseau
- Univ Rennes , INSA Rennes , CNRS, Institut FOTON - UMR 6082, F- 35000 Rennes , France
| | - Jacky Even
- Univ Rennes , INSA Rennes , CNRS, Institut FOTON - UMR 6082, F- 35000 Rennes , France
| | - Jared J Crochet
- Physical Chemistry and Applied Spectroscopy Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Aditya D Mohite
- Department of Chemical and Biomolecular Engineering , Rice University , Houston , Texas 77006 , United States
| | - Claudine Katan
- Univ Rennes, ENSCR , INSA Rennes , CNRS, ISCR - UMR 6226, F- 35000 Rennes , France
| | - Sergei Tretiak
- Theoretical Physics and Chemistry of Materials , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
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40
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Inaguma Y, Aimi A, Mori D, Katsumata T, Ohtake M, Nakayama M, Yonemura M. High-Pressure Synthesis, Crystal Structure, Chemical Bonding, and Ferroelectricity of LiNbO 3-Type LiSbO 3. Inorg Chem 2018; 57:15462-15473. [PMID: 30507117 DOI: 10.1021/acs.inorgchem.8b02767] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A polar LiNbO3 (LN)-type oxide LiSbO3 was synthesized by a high-temperature heat treatment under a pressure of 7.7 GPa and found to exhibit ferroelectricity. The crystal structural refinement using the data of synchrotron powder X-ray diffraction and neutron diffraction and the electronic structure calculation of LN-type LiSbO3 suggest a covalent-bonding character between Sb and O. When comparing the distortion of BO6 in LN-type ABO3, the distortions of SbO6 in LiSbO3 and SnO6 in ZnSnO3, which included a B cation with a d10 electronic configuration, were smaller than those of BO6 in LN-type oxides having the second-order Jahn-Teller active B cation, e.g., LiNbO3 and ZnTiO3. The temperature dependence of the lattice parameters, second harmonic generation, dielectric permittivity, and differential scanning calorimetry made it clear that a second-order ferroelectric-paraelectric phase transition occurs at a Curie temperature of Tc = 605 ± 10 K in LN-type LiSbO3. Further, first-principles density functional theory calculation suggested that perovskite-type LiSbO3 is less stable than LN-type LiSbO3 under even high pressure, and the ambient phase of LiSbO3 directly transforms to LN-type LiSbO3 under high pressure. The phase stability of LN-type LiSbO3 and the polar and ferroelectric properties are rationalized by the covalent bonding of Sb-O and the relatively weak Coulomb repulsion between Li+ and Sb5+.
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Affiliation(s)
- Yoshiyuki Inaguma
- Department of Chemistry, Faculty of Science , Gakushuin University , 1-5-1 Mejiro , Toshima-ku, Tokyo 171-8588 , Japan
| | - Akihisa Aimi
- Department of Chemistry, Faculty of Science , Gakushuin University , 1-5-1 Mejiro , Toshima-ku, Tokyo 171-8588 , Japan
| | - Daisuke Mori
- Department of Chemistry, Faculty of Science , Gakushuin University , 1-5-1 Mejiro , Toshima-ku, Tokyo 171-8588 , Japan
| | - Tetsuhiro Katsumata
- Department of Chemistry, School of Science , Tokai University , 4-1-1 Kitakaname , Hiratsuka , Kanagawa 259-1292 , Japan
| | - Masanari Ohtake
- Frontier Research Institute for Materials Science , Nagoya Institute of Technology , Gokiso-cho, Showa-ku, Nagoya City , Aichi 466-8555 , Japan
| | - Masanobu Nakayama
- Frontier Research Institute for Materials Science , Nagoya Institute of Technology , Gokiso-cho, Showa-ku, Nagoya City , Aichi 466-8555 , Japan.,Center for Materials Research by Information Integration, Research and Services Division of Materials Data and Integrated System , National Institute for Materials Science , 1-2-1 Sengen , Tsukuba , Ibaraki 305-0047 , Japan.,Global Research Center for Environment and Energy based on Nanomaterials Science , National Institute for Materials Science , 1-1 Namiki , Tsukuba , Ibaraki 305-0047 , Japan.,Elements Strategy Initiative for Catalysts and Batteries , Kyoto University , 1-30 Goryo-Ohara , Nishikyo , Kyoto 615-8245 , Japan
| | - Masao Yonemura
- Institute of Materials Structure Science , High Energy Accelerator Research Organization , 1-1 Oho , Tsukuba , Ibaraki 305-0801 , Japan.,Sokendai (The Graduate University for Advanced Studies) , Shirakata 203-1 , Tokai , Naka 319-1106 , Japan
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Gao H, Seymour ID, Xin S, Xue L, Henkelman G, Goodenough JB. Na3MnZr(PO4)3: A High-Voltage Cathode for Sodium Batteries. J Am Chem Soc 2018; 140:18192-18199. [DOI: 10.1021/jacs.8b11388] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Hongcai Gao
- Texas Materials
Institute, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Ieuan D. Seymour
- Department of Chemistry and the Institute for Computational Engineering and Sciences, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Sen Xin
- Texas Materials
Institute, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Leigang Xue
- Texas Materials
Institute, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Graeme Henkelman
- Department of Chemistry and the Institute for Computational Engineering and Sciences, The University of Texas at Austin, Austin, Texas 78712, United States
| | - John B. Goodenough
- Texas Materials
Institute, The University of Texas at Austin, Austin, Texas 78712, United States
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Lang RA, Japahuge A, Zeng T. General formalism of vibronic Hamiltonians for tetrahedral and octahedral systems: Problems that involve A-type states and a-type vibrations. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.08.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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43
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Ghumare AB, Mane ML, Shirsath SE, Lohar KS. Role of pH and Sintering Temperature on the Properties of Tetragonal–Cubic Phases Composed Copper Ferrite Nanoparticles. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-018-0927-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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44
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Venediktova OS, Bulavchenko OA, Tsyrulnikov PG, Afonasenko TN, Vinokurov ZS, Tsybulya SV. High-Temperature X-Ray Diffraction Investigation of the Decomposition Process in Manganese-Gallium Spinel Mn1.5Ga1.5O4. J STRUCT CHEM+ 2018. [DOI: 10.1134/s0022476618020166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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47
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Hosain MA, Le Floch JM, Krupka J, Tobar ME. Aggregate frequency width, nuclear hyperfine coupling and Jahn-Teller effect of Cu 2+ impurity ion ESR in SrLaAlO 4 dielectric resonator at 20 millikelvin. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:015802. [PMID: 29130900 DOI: 10.1088/1361-648x/aa9a1e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The impurity paramagnetic ion, [Formula: see text] substitutes Al in the [Formula: see text] single crystal lattice, this results in a [Formula: see text] elongated octahedron, and the resulting measured g-factors satisfy four-fold axes variation condition. The aggregate frequency width of the electron spin resonance with the required minimum level of impurity concentration has been evaluated in this single crystal [Formula: see text] at 20 millikelvin. Measured parallel hyperfine constants, [Formula: see text], were determined to be [Formula: see text] and [Formula: see text] at [Formula: see text] for the nuclear magnetic quantum number [Formula: see text], and [Formula: see text] respectively. The anisotropy of the hyperfine structure reveals the characteristics of the static Jahn-Teller effect. The second-order-anisotropy term, [Formula: see text], is significant and cannot be disregarded, with the local strain dominating over the observed Zeeman-anisotropy-energy difference. The Bohr electron magneton, [Formula: see text], (within [Formula: see text] so-called experimental error) has been found using the measured spin-Hamiltonian parameters. Measured nuclear dipolar hyperfine structure parameter [Formula: see text] shows that the mean inverse third power of the electron distance from the nucleus is [Formula: see text] a.u. for [Formula: see text] ion in the substituted [Formula: see text] ion site assuming nuclear electric quadruple moment [Formula: see text] barn.
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Affiliation(s)
- M A Hosain
- ARC Centre of Excellence for Engineered Quantum Systems, School of Physics, University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia
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Zhang Y, Wang J, Sahoo MPK, Shimada T, Kitamura T. Strain-induced ferroelectricity and lattice coupling in BaSnO 3 and SrSnO 3. Phys Chem Chem Phys 2017; 19:26047-26055. [PMID: 28926037 DOI: 10.1039/c7cp03952b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Perovskite stannates such as BaSnO3 and SrSnO3 exhibit promising photovoltaic properties, and hold promise for application in solar cell devices. However, the lack of ferroelectricity and the wide band gap in these materials limit their potential for photovoltaic applications. Here, by first-principles calculations, we demonstrate the realization of a primary ferroelectric polarization in non-ferroelectric BaSnO3 and SrSnO3 through strain engineering. In addition to the appearance of polarization, the band gaps of the materials are greatly narrowed when the paraelectric to ferroelectric phase transition takes place under compressive strain. Furthermore, an intriguing Q2 mode triggered by lattice coupling with the polar mode is found in the stannates subjected to a sufficient tensile strain and this mode has a significant effect on the band gap, which suggests another pathway to narrow the band gap through the electric field control of the Q2 mode. The fruitful electronic, structural, and energetic properties are discussed in detail to achieve a fundamental understanding of the strain-induced ferroelectricity, tunable band gap, and lattice couplings between the Q2 mode and different polar/rotational distortions in the perovskite stannates.
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Affiliation(s)
- Yajun Zhang
- Department of Engineering Mechanics, School of Aeronautics and Astronautics, Zhejiang University, 38 Zheda Road, Hangzhou 310007, China.
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Zeng T, Hickman RJ, Kadri A, Seidu I. General Formalism of Vibronic Hamiltonians for Tetrahedral and Octahedral Systems: Problems That Involve T, E States and t, e Vibrations. J Chem Theory Comput 2017; 13:5004-5018. [DOI: 10.1021/acs.jctc.7b00787] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tao Zeng
- Department of Chemistry, Carleton University, Ottawa, Ontario K1S5B6, Canada
| | - Riley J. Hickman
- Department of Chemistry, Carleton University, Ottawa, Ontario K1S5B6, Canada
| | - Aya Kadri
- Department of Chemistry, Carleton University, Ottawa, Ontario K1S5B6, Canada
| | - Issaka Seidu
- Department of Chemistry, Carleton University, Ottawa, Ontario K1S5B6, Canada
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Smari M, Felhi H, Hamdi R, Nouri K, Dhahri E, Bessais L. Correlation between structural, magnetic and electric properties of La0.5Ca0.3Te0.2MnO3 sample synthesis by sol-gel method. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.06.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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