Nodeless Superconducting Gap in the Candidate Topological Superconductor Sn{sub 1-x}In{sub x}Te for x=0.7.

Smylie, M. P.; Kobayashi, Kaya; Takahashi, T.; Chaparro, C.; Snezhko, A.; Kwok, W. -K.; Welp, U.

doi:10.1103/PhysRevB.101.094513

Title: Nodeless Superconducting Gap in the Candidate Topological Superconductor Sn{sub 1-x}In{sub x}Te for x=0.7.

Journal Article · Fri Mar 13 00:00:00 EDT 2020 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.101.094513· OSTI ID:1608297

Smylie, M. P.; Kobayashi, Kaya; Takahashi, T.; Chaparro, C.; Snezhko, A.; Kwok, W. -K.; Welp, U.

High-pressure synthesis techniques have allowed for the growth of Sn1-xInxTe samples beyond the ambient In-saturation limit of x = 0.5 (T-c similar to 4.5 K). In this study we present measurements of the temperature dependence of the London penetration depth Delta lambda(T) in this superconducting doped topological insulator for x = 0.7, where T-c(,onset) approximate to 5 K. The results indicate fully gapped BCS-like behavior, ruling out odd-parity A(2u), pairing; however, odd-parity A(1u) in pairing is still possible. Critical field values measured below 1 K and other superconducting parameters are also presented.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1608297

Journal Information:: Physical Review B, Vol. 101, Issue 9

Country of Publication:: United States

Language:: English

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