Superconductivity in In-doped AgSnBiTe3 with possible band inversion

Abstract We investigated the chemical pressure effects on structural and electronic properties of SnTe-based material using partial substitution of Sn by Ag0.5Bi0.5, which results in lattice shrinkage. For Sn1−2x (AgBi) x Te, single-phase polycrystalline samples were obtained with a wide range of x....

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Autores principales:	Tsubasa Mitobe, Kazuhisa Hoshi, Md. Riad Kasem, Ryosuke Kiyama, Hidetomo Usui, Aichi Yamashita, Ryuji Higashinaka, Tatsuma D. Matsuda, Yuji Aoki, Takayoshi Katase, Yosuke Goto, Yoshikazu Mizuguchi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/405ee2dc299c4de5873b80f0e908fbef
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spelling	oai:doaj.org-article:405ee2dc299c4de5873b80f0e908fbef2021-11-28T12:20:06ZSuperconductivity in In-doped AgSnBiTe3 with possible band inversion10.1038/s41598-021-02341-92045-2322https://doaj.org/article/405ee2dc299c4de5873b80f0e908fbef2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02341-9https://doaj.org/toc/2045-2322Abstract We investigated the chemical pressure effects on structural and electronic properties of SnTe-based material using partial substitution of Sn by Ag0.5Bi0.5, which results in lattice shrinkage. For Sn1−2x (AgBi) x Te, single-phase polycrystalline samples were obtained with a wide range of x. On the basis of band calculations, we confirmed that the Sn1−2x (AgBi) x Te system is basically possessing band inversion and topologically preserved electronic states. To explore new superconducting phases related to the topological electronic states, we investigated the In-doping effects on structural and superconducting properties for x = 0.33 (AgSnBiTe3). For (AgSnBi)(1−y)/3In y Te, single-phase polycrystalline samples were obtained for y = 0–0.5 by high-pressure synthesis. Superconductivity was observed for y = 0.2–0.5. For y = 0.4, the transition temperature estimated from zero-resistivity state was 2.4 K, and the specific heat investigation confirmed the emergence of bulk superconductivity. Because the presence of band inversion was theoretically predicted, and the parameters obtained from specific heat analyses were comparable to In-doped SnTe, we expect that the (AgSnBi)(1−y)/3In y Te and other (Ag, In, Sn, Bi)Te phases are candidate systems for studying topological superconductivity.Tsubasa MitobeKazuhisa HoshiMd. Riad KasemRyosuke KiyamaHidetomo UsuiAichi YamashitaRyuji HigashinakaTatsuma D. MatsudaYuji AokiTakayoshi KataseYosuke GotoYoshikazu MizuguchiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tsubasa Mitobe Kazuhisa Hoshi Md. Riad Kasem Ryosuke Kiyama Hidetomo Usui Aichi Yamashita Ryuji Higashinaka Tatsuma D. Matsuda Yuji Aoki Takayoshi Katase Yosuke Goto Yoshikazu Mizuguchi Superconductivity in In-doped AgSnBiTe3 with possible band inversion
description	Abstract We investigated the chemical pressure effects on structural and electronic properties of SnTe-based material using partial substitution of Sn by Ag0.5Bi0.5, which results in lattice shrinkage. For Sn1−2x (AgBi) x Te, single-phase polycrystalline samples were obtained with a wide range of x. On the basis of band calculations, we confirmed that the Sn1−2x (AgBi) x Te system is basically possessing band inversion and topologically preserved electronic states. To explore new superconducting phases related to the topological electronic states, we investigated the In-doping effects on structural and superconducting properties for x = 0.33 (AgSnBiTe3). For (AgSnBi)(1−y)/3In y Te, single-phase polycrystalline samples were obtained for y = 0–0.5 by high-pressure synthesis. Superconductivity was observed for y = 0.2–0.5. For y = 0.4, the transition temperature estimated from zero-resistivity state was 2.4 K, and the specific heat investigation confirmed the emergence of bulk superconductivity. Because the presence of band inversion was theoretically predicted, and the parameters obtained from specific heat analyses were comparable to In-doped SnTe, we expect that the (AgSnBi)(1−y)/3In y Te and other (Ag, In, Sn, Bi)Te phases are candidate systems for studying topological superconductivity.
format	article
author	Tsubasa Mitobe Kazuhisa Hoshi Md. Riad Kasem Ryosuke Kiyama Hidetomo Usui Aichi Yamashita Ryuji Higashinaka Tatsuma D. Matsuda Yuji Aoki Takayoshi Katase Yosuke Goto Yoshikazu Mizuguchi
author_facet	Tsubasa Mitobe Kazuhisa Hoshi Md. Riad Kasem Ryosuke Kiyama Hidetomo Usui Aichi Yamashita Ryuji Higashinaka Tatsuma D. Matsuda Yuji Aoki Takayoshi Katase Yosuke Goto Yoshikazu Mizuguchi
author_sort	Tsubasa Mitobe
title	Superconductivity in In-doped AgSnBiTe3 with possible band inversion
title_short	Superconductivity in In-doped AgSnBiTe3 with possible band inversion
title_full	Superconductivity in In-doped AgSnBiTe3 with possible band inversion
title_fullStr	Superconductivity in In-doped AgSnBiTe3 with possible band inversion
title_full_unstemmed	Superconductivity in In-doped AgSnBiTe3 with possible band inversion
title_sort	superconductivity in in-doped agsnbite3 with possible band inversion
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/405ee2dc299c4de5873b80f0e908fbef
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Superconductivity in In-doped AgSnBiTe3 with possible band inversion

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