Superconductivity, pairing symmetry, and disorder in the doped topological insulator Sn1-xInxTe for x≥0.10

Smylie, M. P.; Claus, H.; Kwok, W. -K.; Louden, E. R.; Eskildsen, M. R.; Sefat, A. S.; Zhong, R. D.; Schneeloch, J.; Gu, G. D.; Bokari, E.; Niraula, P. M.; Kayani, A.; Dewhurst, C. D.; Snezhko, A.; Welp, U.

doi:10.1103/physrevb.97.024511

Title: Superconductivity, pairing symmetry, and disorder in the doped topological insulator ${Sn}_{1 - x} {In}_{x} Te$ for $x \geq 0.10$

Journal Article · Fri Jan 19 00:00:00 EST 2018 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.97.024511· OSTI ID:1422598

Smylie, M. P. ^[1]; Claus, H. ^[2]; Kwok, W. -K. ^[2]; Louden, E. R. ^[3]; Eskildsen, M. R. ^[3]; Sefat, A. S. ^[4]; Zhong, R. D. ^[5]; Schneeloch, J. ^[6]; Gu, G. D. ^[7]; Bokari, E. ^[8]; Niraula, P. M. ^[8]; Kayani, A. ^[8]; Dewhurst, C. D. ^[9]; Snezhko, A. ^[2]; Welp, U. ^[2]

Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Notre Dame, IN (United States). Dept. of Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Univ. of Notre Dame, IN (United States). Dept. of Physics
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Stony Brook Univ., NY (United States). Materials Science and Engineering Dept.
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Western Michigan Univ., Kalamazoo, MI (United States). Dept. of Physics
Inst. Laue-Langevin, Grenoble (France)

The temperature dependence of the London penetration depth Δλ(T) in the superconducting doped topological crystalline insulator Sn_1-xIn_x Te was measured down to 450 mK for two different doping levels, x ≈ 0.45 (optimally doped) and x ≈ 0.10 (underdoped), bookending the range of cubic phase in the compound. The results indicate no deviation from fully gapped BCS-like behavior, eliminating several candidate unconventional gap structures. Critical field values below 1 K and other superconducting parameters are also presented. The introduction of disorder by repeated particle irradiation with 5 MeV protons does not enhance T_c, indicating that ferroelectric interactions do not compete with superconductivity.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Notre Dame, IN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725; SC0005051; SC0012704

OSTI ID:: 1422598

Alternate ID(s):: OSTI ID: 1417506; OSTI ID: 1425063; OSTI ID: 1432141

Report Number(s):: BNL-200080-2018-JAAM; TRN: US1801635

Journal Information:: Physical Review B, Vol. 97, Issue 2; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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Title: Superconductivity, pairing symmetry, and disorder in the doped topological insulator Sn 1 - x In x Te for x ≥ 0.10

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