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Wang J, Powers W, Zhang Z, Smith M, McIntosh BJ, Bac SK, Riney L, Zhukovskyi M, Orlova T, Rokhinson LP, Hsu YT, Liu X, Assaf BA. Observation of Coexisting Weak Localization and Superconducting Fluctuations in Strained Sn 1-xIn xTe Thin Films. NANO LETTERS 2022; 22:792-800. [PMID: 35007089 DOI: 10.1021/acs.nanolett.1c04370] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Topological superconductors have attracted tremendous excitement as they are predicted to host Majorana zero modes that can be utilized for topological quantum computing. Candidate topological superconductor Sn1-xInxTe thin films (0 < x < 0.3) grown by molecular beam epitaxy and strained in the (111) plane are shown to host quantum interference effects in the conductivity coexisting with superconducting fluctuations above the critical temperature Tc. An analysis of the normal state magnetoresistance reveals these effects. A crossover from weak antilocalization to localization is consistently observed in superconducting samples, indicating that superconductivity originates dominantly from charge carriers occupying trivial states that may be strongly spin-orbit split. A large enhancement of the conductivity is observed above Tc, indicating the presence of superconducting fluctuations. Our results motivate a re-examination of the debated pairing symmetry of this material when subjected to quantum confinement and lattice strain.
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Affiliation(s)
- Jiashu Wang
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - William Powers
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Zhan Zhang
- X-ray Science Division, Advanced Photon Source, Argonne National Lab, Lemont, Illinois 60439, United States
| | - Michael Smith
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Bradlee J McIntosh
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Seul Ki Bac
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Logan Riney
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Maksym Zhukovskyi
- Notre Dame Integrated Imaging Facility, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Tatyana Orlova
- Notre Dame Integrated Imaging Facility, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Leonid P Rokhinson
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
- Department of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Yi-Ting Hsu
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Xinyu Liu
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Badih A Assaf
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
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Fatemi V, Wu S, Cao Y, Bretheau L, Gibson QD, Watanabe K, Taniguchi T, Cava RJ, Jarillo-Herrero P. Electrically tunable low-density superconductivity in a monolayer topological insulator. Science 2018; 362:926-929. [DOI: 10.1126/science.aar4642] [Citation(s) in RCA: 204] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 10/09/2018] [Indexed: 01/14/2023]
Affiliation(s)
- Valla Fatemi
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sanfeng Wu
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yuan Cao
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Landry Bretheau
- Laboratoire des Solides Irradiés, École Polytechnique, CNRS, CEA, 91128 Palaiseau Cedex, France
| | - Quinn D. Gibson
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZX, UK
| | - Kenji Watanabe
- Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Takashi Taniguchi
- Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Robert J. Cava
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Pablo Jarillo-Herrero
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Saito Y, Kasahara Y, Ye J, Iwasa Y, Nojima T. Metallic ground state in an ion-gated two-dimensional superconductor. Science 2015; 350:409-13. [DOI: 10.1126/science.1259440] [Citation(s) in RCA: 187] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 09/15/2015] [Indexed: 11/02/2022]
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Zheng G, Ozaki H, Clark WG, Kitaoka Y, Kuhns P, Reyes AP, Moulton WG, Kondo T, Shimakawa Y, Kubo Y. Superconducting fluctuations and the pseudogap in the slightly overdoped high- T(c) superconductor TlSr2CaCu2O6.8: high magnetic field NMR studies. PHYSICAL REVIEW LETTERS 2000; 85:405-408. [PMID: 10991294 DOI: 10.1103/physrevlett.85.405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2000] [Indexed: 05/23/2023]
Abstract
From measurements of the 63Cu Knight shift ( K) and the nuclear spin-lattice relaxation rate ( 1/T1) under magnetic fields from zero up to 28 T in the slightly overdoped high- T(c) superconductor TlSr2CaCu2O6.8 ( T(c) = 68 K), we find that the pseudogap behavior, i.e., the reductions of 1/T1T and K above T(c) from the values expected from the normal state at high T, is strongly field dependent and follows a scaling relation. We show that this scaling is consistent with the effects of the Cooper pair density fluctuations. The present finding contrasts sharply with the pseudogap property reported previously in the underdoped regime where no field effect was seen up to 23.2 T. The implications are discussed.
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Affiliation(s)
- Gq Zheng
- Department of Physical Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Carretta P, Livanov DV, Rigamonti A, Varlamov AA. Superconducting fluctuations and 63Cu NQR-NMR relaxation in YBa2Cu3O7- delta : Effect of magnetic field and a test for the pairing-state symmetry. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R9682-R9685. [PMID: 9984791 DOI: 10.1103/physrevb.54.r9682] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Axnäs J, Holm W, Eltsev Y, Rapp Ö. Sign Change of c-Axis Magnetoconductivity in YBa2Cu3O7- delta Single Crystals. PHYSICAL REVIEW LETTERS 1996; 77:2280-2283. [PMID: 10061904 DOI: 10.1103/physrevlett.77.2280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Pomar A, Ramallo MV, Mosqueira J, Torrón C, Vidal F. Fluctuation-induced in-plane conductivity, magnetoconductivity, and diamagnetism of Bi2Sr2CaCu2O8 single crystals in weak magnetic fields. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:7470-7480. [PMID: 9984374 DOI: 10.1103/physrevb.54.7470] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Balestrino G, Milani E, Aruta C, Varlamov AA. c-axis resistance peak above the critical temperature in layered superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:3628-3632. [PMID: 9986270 DOI: 10.1103/physrevb.54.3628] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ramallo MV, Pomar A, Vidal F. In-plane paraconductivity and fluctuation-induced magnetoconductivity in biperiodic layered superconductors: Application to YBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:4341-4356. [PMID: 9986341 DOI: 10.1103/physrevb.54.4341] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Nygmatulin AS, Varlamov AA, Livanov DV, Balestrino G, Milani E. Effect of the magnetic field on the c-axis resistance peak in Bi2Sr2CaCu2O8+x epitaxial films. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:3557-3560. [PMID: 9983870 DOI: 10.1103/physrevb.53.3557] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hashimoto K, Nakao K, Kado H, Koshizuka N. c-axis negative magnetoresistance and fluctuation conductivity of Bi2Sr2CaCu2Ox single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:892-895. [PMID: 9983046 DOI: 10.1103/physrevb.53.892] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Luo S, Yang G, Gough CE. Field and temperature dependence of the c-axis critical current in Bi2Sr2CaCu2O8+ delta single crystals at the melting and two-dimensional decomposition fields. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:6655-6662. [PMID: 9977200 DOI: 10.1103/physrevb.51.6655] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Randeria M, Varlamov AA. Effect of superconducting fluctuations on spin susceptibility and NMR relaxation rate. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:10401-10404. [PMID: 9975138 DOI: 10.1103/physrevb.50.10401] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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