Full superconducting gap in the candidate topological superconductor In1-x Pbx Te for x=0.2

M. P. Smylie; Kaya Kobayashi; J. Z. Dans; H. Hebbeker; R. Chapai; W. K. Kwok; U. Welp

doi:10.1103/PhysRevB.106.054503

Full superconducting gap in the candidate topological superconductor In1-x Pbx Te for x=0.2

M. P. Smylie, Kaya Kobayashi, J. Z. Dans, H. Hebbeker, R. Chapai, W. K. Kwok, U. Welp

Research Institute for Interdisciplinary Science

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

High-pressure synthesis techniques have allowed for the growth of samples on the indium-rich side of (Pb,In)Te, which have increased superconducting transition temperatures compared to lead-rich compounds. In this paper we present measurements of the temperature dependence of the London penetration depth Δλ(T) in the compound In0.8Pb0.2Te, which shows a bulk Tc,onset of ∼4.75 K. The results indicate fully gapped BCS-like behavior, ruling out odd-parity topologically nontrivial A2u pairing, however, odd-parity A1u pairing is still possible. Critical field values measured below 1 K and other superconducting parameters are also presented.

Original language	English
Article number	054503
Journal	Physical Review B
Volume	106
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.106.054503
Publication status	Published - Aug 1 2022

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Full superconducting gap in the candidate topological superconductor In1-x Pbx Te for x=0.2",

abstract = "High-pressure synthesis techniques have allowed for the growth of samples on the indium-rich side of (Pb,In)Te, which have increased superconducting transition temperatures compared to lead-rich compounds. In this paper we present measurements of the temperature dependence of the London penetration depth Δλ(T) in the compound In0.8Pb0.2Te, which shows a bulk Tc,onset of ∼4.75 K. The results indicate fully gapped BCS-like behavior, ruling out odd-parity topologically nontrivial A2u pairing, however, odd-parity A1u pairing is still possible. Critical field values measured below 1 K and other superconducting parameters are also presented.",

author = "Smylie, {M. P.} and Kaya Kobayashi and Dans, {J. Z.} and H. Hebbeker and R. Chapai and Kwok, {W. K.} and U. Welp",

note = "Funding Information: TDO and magnetization measurements at Argonne were supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Crystal synthesis was supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) under Grants No. 18K03540, No. 19H01852, and No. 20K05272. Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

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doi = "10.1103/PhysRevB.106.054503",

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AU - Smylie, M. P.

AU - Kobayashi, Kaya

AU - Dans, J. Z.

AU - Hebbeker, H.

AU - Chapai, R.

AU - Kwok, W. K.

AU - Welp, U.

N1 - Funding Information: TDO and magnetization measurements at Argonne were supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Crystal synthesis was supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) under Grants No. 18K03540, No. 19H01852, and No. 20K05272. Publisher Copyright: © 2022 American Physical Society.

PY - 2022/8/1

Y1 - 2022/8/1

N2 - High-pressure synthesis techniques have allowed for the growth of samples on the indium-rich side of (Pb,In)Te, which have increased superconducting transition temperatures compared to lead-rich compounds. In this paper we present measurements of the temperature dependence of the London penetration depth Δλ(T) in the compound In0.8Pb0.2Te, which shows a bulk Tc,onset of ∼4.75 K. The results indicate fully gapped BCS-like behavior, ruling out odd-parity topologically nontrivial A2u pairing, however, odd-parity A1u pairing is still possible. Critical field values measured below 1 K and other superconducting parameters are also presented.

AB - High-pressure synthesis techniques have allowed for the growth of samples on the indium-rich side of (Pb,In)Te, which have increased superconducting transition temperatures compared to lead-rich compounds. In this paper we present measurements of the temperature dependence of the London penetration depth Δλ(T) in the compound In0.8Pb0.2Te, which shows a bulk Tc,onset of ∼4.75 K. The results indicate fully gapped BCS-like behavior, ruling out odd-parity topologically nontrivial A2u pairing, however, odd-parity A1u pairing is still possible. Critical field values measured below 1 K and other superconducting parameters are also presented.

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Full superconducting gap in the candidate topological superconductor In1-x Pbx Te for x=0.2

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