Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions

Abstract Recently, unconventional superconductivity having a zero-bias conductance peak is reported in doped topological Dirac semimetal (DSM) with lattice distortion. Motivated by the experiments, we theoretically study the possible symmetry-lowering lattice distortions and their effects on the eme...

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Autores principales:	Sangmo Cheon, Ki Hoon Lee, Suk Bum Chung, Bohm-Jung Yang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/51868aedc676475b8b234f3da1e87fb8
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spelling	oai:doaj.org-article:51868aedc676475b8b234f3da1e87fb82021-12-02T18:02:06ZEmergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions10.1038/s41598-021-97982-12045-2322https://doaj.org/article/51868aedc676475b8b234f3da1e87fb82021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97982-1https://doaj.org/toc/2045-2322Abstract Recently, unconventional superconductivity having a zero-bias conductance peak is reported in doped topological Dirac semimetal (DSM) with lattice distortion. Motivated by the experiments, we theoretically study the possible symmetry-lowering lattice distortions and their effects on the emergence of unconventional superconductivity in doped topological DSM. We find four types of symmetry-lowering lattice distortions that reproduce the crystal symmetries relevant to experiments from the group-theoretical analysis. Considering inter-orbital and intra-orbital electron density-density interactions, we calculate superconducting phase diagrams. We find that the lattice distortions can induce unconventional superconductivity hosting gapless surface Andreev bound states (SABS). Depending on the lattice distortions and superconducting pairing interactions, the unconventional inversion-odd-parity superconductivity can be either topological nodal superconductivity hosting a flat SABS or topological crystalline superconductivity hosting a gapless SABS. Remarkably, the lattice distortions increase the superconducting critical temperature, which is consistent with the experiments. Our work opens a pathway to explore and control pressure-induced topological superconductivity in doped topological semimetals.Sangmo CheonKi Hoon LeeSuk Bum ChungBohm-Jung YangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-25 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sangmo Cheon Ki Hoon Lee Suk Bum Chung Bohm-Jung Yang Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions
description	Abstract Recently, unconventional superconductivity having a zero-bias conductance peak is reported in doped topological Dirac semimetal (DSM) with lattice distortion. Motivated by the experiments, we theoretically study the possible symmetry-lowering lattice distortions and their effects on the emergence of unconventional superconductivity in doped topological DSM. We find four types of symmetry-lowering lattice distortions that reproduce the crystal symmetries relevant to experiments from the group-theoretical analysis. Considering inter-orbital and intra-orbital electron density-density interactions, we calculate superconducting phase diagrams. We find that the lattice distortions can induce unconventional superconductivity hosting gapless surface Andreev bound states (SABS). Depending on the lattice distortions and superconducting pairing interactions, the unconventional inversion-odd-parity superconductivity can be either topological nodal superconductivity hosting a flat SABS or topological crystalline superconductivity hosting a gapless SABS. Remarkably, the lattice distortions increase the superconducting critical temperature, which is consistent with the experiments. Our work opens a pathway to explore and control pressure-induced topological superconductivity in doped topological semimetals.
format	article
author	Sangmo Cheon Ki Hoon Lee Suk Bum Chung Bohm-Jung Yang
author_facet	Sangmo Cheon Ki Hoon Lee Suk Bum Chung Bohm-Jung Yang
author_sort	Sangmo Cheon
title	Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions
title_short	Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions
title_full	Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions
title_fullStr	Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions
title_full_unstemmed	Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions
title_sort	emergence of topological superconductivity in doped topological dirac semimetals under symmetry-lowering lattice distortions
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/51868aedc676475b8b234f3da1e87fb8
work_keys_str_mv	AT sangmocheon emergenceoftopologicalsuperconductivityindopedtopologicaldiracsemimetalsundersymmetryloweringlatticedistortions AT kihoonlee emergenceoftopologicalsuperconductivityindopedtopologicaldiracsemimetalsundersymmetryloweringlatticedistortions AT sukbumchung emergenceoftopologicalsuperconductivityindopedtopologicaldiracsemimetalsundersymmetryloweringlatticedistortions AT bohmjungyang emergenceoftopologicalsuperconductivityindopedtopologicaldiracsemimetalsundersymmetryloweringlatticedistortions
_version_	1718378925986414592

Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions

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