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Pressure effect on iron-based superconductor LaFeAsO 1-xH x: Peculiar response of 1111-type structure. Sci Rep 2016; 6:39646. [PMID: 28004768 PMCID: PMC5177881 DOI: 10.1038/srep39646] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 11/24/2016] [Indexed: 11/08/2022] Open
Abstract
A systematic study of the crystal structure of a layered iron oxypnictide LaFeAsO1-xHx as a function of pressure was performed using synchrotron X-ray diffraction. This compound exhibits a unique phase diagram of two superconducting phases and two parent phases. We established that the As-Fe-As angle of the FeAs4 tetrahedron widens on the application of pressure due to the interspace between the layers being nearly infilled by the large La and As atoms. Such rarely observed behaviour in iron pnictides implies that the FeAs4 coordination deviates from the regular tetrahedron in the present systems. This breaks a widely accepted structural guide that the superconductivity favours the regular tetrahedron, albeit the superconducting transition temperature (Tc) increases from 18 K at ambient pressure to 52 K at 6 GPa for x = 0.2. In the phase diagram, the second parent phase at x ~ 0.5 is suppressed by pressure as low as ~1.5 GPa in contrast to the first parent phase at x ~ 0, which is robust against pressure. We suggest that certain spin-fluctuation from the second parent phase is strongly related to high-Tc under pressure.
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Wang Z, Yi W, Wu Q, Sidorov VA, Bao J, Tang Z, Guo J, Zhou Y, Zhang S, Li H, Shi Y, Wu X, Zhang L, Yang K, Li A, Cao G, Hu J, Sun L, Zhao Z. Correlation between superconductivity and bond angle of CrAs chain in non-centrosymmetric compounds A 2Cr 3As 3 (A = K, Rb). Sci Rep 2016; 6:37878. [PMID: 27886268 PMCID: PMC5122944 DOI: 10.1038/srep37878] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 11/02/2016] [Indexed: 11/22/2022] Open
Abstract
Non-centrosymmetric superconductors, whose crystal structure is absent of inversion symmetry, have recently received special attentions due to the expectation of unconventional pairings and exotic physics associated with such pairings. The newly discovered superconductors A2Cr3As3 (A = K, Rb), featured by the quasi-one dimensional structure with conducting CrAs chains, belongs to such kind of superconductor. In this study, we are the first to report the finding that superconductivity of A2Cr3As3 (A = K, Rb) has a positive correlation with the extent of non-centrosymmetry. Our in-situ high pressure ac susceptibility and synchrotron x-ray diffraction measurements reveal that the larger bond angle of As-Cr-As (defined as α) in the CrAs chains can be taken as a key factor controlling superconductivity. While the smaller bond angle (defined as β) and the distance between the CrAs chains also affect the superconductivity due to their structural connections with the α angle. We find that the larger value of α-β, which is associated with the extent of the non-centrosymmetry of the lattice structure, is in favor of superconductivity. These results are expected to shed a new light on the underlying mechanism of the superconductivity in these Q1D superconductors and also to provide new perspective in understanding other non-centrosymmetric superconductors.
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Affiliation(s)
- Zhe Wang
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei Yi
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Qi Wu
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Vladimir A. Sidorov
- Institute for High Pressure Physics, Russian Academy of Sciences, 142190 Troitsk, Moscow, Russia
| | - Jinke Bao
- Department of Physics, Zhejiang University, Hangzhou 310027, China
| | - Zhangtu Tang
- Department of Physics, Zhejiang University, Hangzhou 310027, China
| | - Jing Guo
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yazhou Zhou
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Shan Zhang
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Hang Li
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Youguo Shi
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xianxin Wu
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Ling Zhang
- Shanghai Synchrotron Radiation Facilities, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
| | - Ke Yang
- Shanghai Synchrotron Radiation Facilities, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
| | - Aiguo Li
- Shanghai Synchrotron Radiation Facilities, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
| | - Guanghan Cao
- Department of Physics, Zhejiang University, Hangzhou 310027, China
| | - Jiangping Hu
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China
| | - Liling Sun
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China
| | - Zhongxian Zhao
- Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China
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3
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Leonov I, Skornyakov SL, Anisimov VI, Vollhardt D. Correlation-Driven Topological Fermi Surface Transition in FeSe. PHYSICAL REVIEW LETTERS 2015; 115:106402. [PMID: 26382687 DOI: 10.1103/physrevlett.115.106402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Indexed: 06/05/2023]
Abstract
The electronic structure and phase stability of paramagnetic FeSe is computed by using a combination of ab initio methods for calculating band structure and dynamical mean-field theory. Our results reveal a topological change (Lifshitz transition) of the Fermi surface upon a moderate expansion of the lattice. The Lifshitz transition is accompanied with a sharp increase of the local moments and results in an entire reconstruction of magnetic correlations from the in-plane magnetic wave vector, (π,π) to (π,0). We attribute this behavior to a correlation-induced shift of the van Hove singularity originating from the d(xy) and d(xz)/d(yz) bands at the M point across the Fermi level. We propose that superconductivity is strongly influenced, or even induced, by a van Hove singularity.
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Affiliation(s)
- I Leonov
- Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, Augsburg 86135, Germany
| | - S L Skornyakov
- Institute of Metal Physics, Sofia Kovalevskaya Street 18, 620990 Yekaterinburg GSP-170, Russia
- Ural Federal University, 620002 Yekaterinburg, Russia
| | - V I Anisimov
- Institute of Metal Physics, Sofia Kovalevskaya Street 18, 620990 Yekaterinburg GSP-170, Russia
- Ural Federal University, 620002 Yekaterinburg, Russia
| | - D Vollhardt
- Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, Augsburg 86135, Germany
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Lee K, Kaseman D, Sen S, Hung I, Gan Z, Gerke B, Pöttgen R, Feygenson M, Neuefeind J, Lebedev OI, Kovnir K. Intricate Short-Range Ordering and Strongly Anisotropic Transport Properties of Li1–xSn2+xAs2. J Am Chem Soc 2015; 137:3622-30. [DOI: 10.1021/jacs.5b00237] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Ivan Hung
- Center of Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Zhehong Gan
- Center of Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Birgit Gerke
- Institut
für Anorganische und Analytische Chemie, Universit ät Münster, Corrensstrasse 30, 48149 Münster, Germany
| | - Rainer Pöttgen
- Institut
für Anorganische und Analytische Chemie, Universit ät Münster, Corrensstrasse 30, 48149 Münster, Germany
| | - Mikhail Feygenson
- Chemical
and Engineering Materials Division, Oak Ridge National Laboratory, Oak
Ridge, Tennessee 37831, United States
| | - Jörg Neuefeind
- Chemical
and Engineering Materials Division, Oak Ridge National Laboratory, Oak
Ridge, Tennessee 37831, United States
| | - Oleg I. Lebedev
- Laboratoire CRISMAT, UMR 6508, ENSICAEN-CNRS, Université Caen, 14050 Caen, France
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Guo J, Lei H, Hayashi F, Hosono H. Superconductivity and phase instability of NH3-free Na-intercalated FeSe1-zSz. Nat Commun 2014; 5:4756. [DOI: 10.1038/ncomms5756] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 07/18/2014] [Indexed: 11/09/2022] Open
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Roslova MV, Lebedev OI, Morozov IV, Aswartham S, Wurmehl S, Büchner B, Shevelkov AV. Diversity of microstructural phenomena in superconducting and non-superconducting Rb(x)Fe(2-y)Se2: a transmission electron microscopy study at the atomic scale. Inorg Chem 2013; 52:14419-27. [PMID: 24283501 DOI: 10.1021/ic402710r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Superconducting (SC) and non-superconducting (non-SC)Rb(x)Fe(2-y)Se2 crystals were grown using the "self-flux" technique in order to assign the microstructural changes to the onset of superconductivity in complex iron selenides. The crystals were thoroughly characterized by magnetic susceptibility and transport measurements as well as powder X-ray diffraction. Special attention was paid to the comparison of the microstructure of the crystals with and without the superconducting transition by means of transmission electron microscopy (TEM). It is shown that the alternation of ordered and disordered regions on the sample surface and along the c-axis is characteristic for both SC and non-SC materials and therefore does not necessarily represent a trigger of superconductivity. Three types of electron diffraction patterns were found for the superconducting Rb(x)Fe(2-y)Se2 sample, of which one is observed for the first time and originates from alkali metal ordering. Moreover, for the superconducting Rb(x)Fe(2-y)Se2 material a monoclinic distortion with β ∼ 87° was observed, leading to the space group I2/m. This monoclinic distortion seems to be an attribute of the superconducting material only, whereas in the non-superconducting sample the orthogonality of the crystallographic axes is preserved.
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Affiliation(s)
- Maria V Roslova
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia
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Zhao J, Liu H, Ehm L, Dong D, Chen Z, Liu Q, Hu W, Wang N, Jin C. Pressure-Induced Phase Transitions and Correlation between Structure and Superconductivity in Iron-Based Superconductor Ce(O0.84F0.16)FeAs. Inorg Chem 2013; 52:8067-73. [DOI: 10.1021/ic400727g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jinggeng Zhao
- Natural Science Research Center, Academy of Fundamental and Interdisciplinary
Sciences, Harbin Institute of Technology, Harbin 150080, China
- Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Haozhe Liu
- Natural Science Research Center, Academy of Fundamental and Interdisciplinary
Sciences, Harbin Institute of Technology, Harbin 150080, China
| | - Lars Ehm
- Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973, United States
- Mineral Physics Institute, Stony Brook University, Stony Brook, New York 11794, United States
| | - Dawei Dong
- Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Physics, Harbin Institute of Technology, Harbin 150080, China
| | - Zhiqiang Chen
- Mineral Physics Institute, Stony Brook University, Stony Brook, New York 11794, United States
| | - Qingqing Liu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Wanzheng Hu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Nanlin Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Changqing Jin
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
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Zhang X, Wang Y, Ma Y. High pressure structures of “111” type iron-based superconductors predicted from first-principles. Phys Chem Chem Phys 2012; 14:15029-35. [DOI: 10.1039/c2cp42734f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Liu Q, Yu X, Wang X, Deng Z, Lv Y, Zhu J, Zhang S, Liu H, Yang W, Wang L, Mao H, Shen G, Lu ZY, Ren Y, Chen Z, Lin Z, Zhao Y, Jin C. Pressure-Induced Isostructural Phase Transition and Correlation of FeAs Coordination with the Superconducting Properties of 111-Type Na1–xFeAs. J Am Chem Soc 2011; 133:7892-6. [PMID: 21528857 DOI: 10.1021/ja2009949] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qingqing Liu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaohui Yu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Los Alamos Neutron Science Center (LANSCE), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Xiancheng Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zheng Deng
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yuxi Lv
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Jinlong Zhu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Sijia Zhang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Haozhe Liu
- Natural Science Research Center, Harbin Institute of Technology, Harbin 150080, China
| | | | | | - Hokwang Mao
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, United States
| | | | - Zhong-Yi Lu
- Department of Physics, Renmin University of China, Beijing 100872, China
| | - Yang Ren
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Zhiqiang Chen
- National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Zhijun Lin
- Los Alamos Neutron Science Center (LANSCE), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Yusheng Zhao
- Los Alamos Neutron Science Center (LANSCE), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Changqing Jin
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
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10
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Cameron JM, Hughes RW, Zhao Y, Gregory DH. Ternary and higher pnictides; prospects for new materials and applications. Chem Soc Rev 2011; 40:4099-118. [DOI: 10.1039/c0cs00132e] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Pitcher MJ, Lancaster T, Wright JD, Franke I, Steele AJ, Baker PJ, Pratt FL, Thomas WT, Parker DR, Blundell SJ, Clarke SJ. Compositional Control of the Superconducting Properties of LiFeAs. J Am Chem Soc 2010; 132:10467-76. [DOI: 10.1021/ja103196c] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael J. Pitcher
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Tom Lancaster
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Jack D. Wright
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Isabel Franke
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Andrew J. Steele
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Peter J. Baker
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Francis L. Pratt
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - William Trevelyan Thomas
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Dinah R. Parker
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Stephen J. Blundell
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Simon J. Clarke
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom, and ISIS Facility, STFC-Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
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Han JT, Zhou JS, Cheng JG, Goodenough JB. A new pnictide superconductor without iron. J Am Chem Soc 2010; 132:908-9. [PMID: 19788183 DOI: 10.1021/ja906883q] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
LiCu(2)P(2) and LiFeP have been synthesized by conventional solid-state reaction. LiCu(2)P(2) has a crystal structure similar to that of BaFe(2)As(2); LiFeP has the same crystal structure as that of LiFeAs. Resistivity and magnetization measurements reveal that they become superconductive at 3.5 K for LiCu(2)P(2) and 4.1 K for LiFeP.
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Affiliation(s)
- Jian-Tao Han
- Texas Materials Institute, ETC 9.102, University of Texas at Austin, Austin, Texas 78712, USA
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