Corner states, hinge states, and Majorana modes in SnTe nanowires

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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2022-02-23

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Department of Applied Physics

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en

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17

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Physical Review B, Volume 105, issue 7, pp. 1-17

Abstract

SnTe materials are one of the most flexible material platforms for exploring the interplay of topology and different types of symmetry breaking. We study symmetry-protected topological states in SnTe nanowires in the presence of various combinations of Zeeman field, s-wave superconductivity and inversion-symmetry-breaking field. We uncover the origin of robust corner states and hinge states in the normal state. In the presence of superconductivity, we find inversion-symmetry-protected gapless bulk Majorana modes, which give rise to quantized thermal conductance in ballistic wires. By introducing an inversion-symmetry-breaking field, the bulk Majorana modes become gapped and topologically protected localized Majorana zero modes appear at the ends of the wire.

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Funding Information: The work is supported by the Foundation for Polish Science through the IRA Programme cofinanced by EU within SG OP. W.B. also acknowledges support by Narodowe Centrum Nauki (NCN, National Science Centre, Poland) Project No. 2019/34/E/ST3/00404. Publisher Copyright: © 2022 American Physical Society.

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DOI

10.1103/PhysRevB.105.075310

Citation

Nguyen, N M, Brzezicki, W & Hyart, T 2022, ' Corner states, hinge states, and Majorana modes in SnTe nanowires ', Physical Review B, vol. 105, no. 7, 075310, pp. 1-17 . https://doi.org/10.1103/PhysRevB.105.075310

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https://urn.fi/URN:NBN:fi:aalto-202203282612

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[article-cris] Perustieteiden korkeakoulu / SCI