BROWSE

Related Scientist

cces's photo.

cces
강상관계물질연구단
more info

ITEM VIEW & DOWNLOAD

Boundary-obstructed topological superconductor in buckled honeycomb lattice under perpendicular electric field

Cited 0 time in webofscience Cited 0 time in scopus
211 Viewed 0 Downloaded
Title
Boundary-obstructed topological superconductor in buckled honeycomb lattice under perpendicular electric field
Author(s)
Rasoul Ghadimi; Seung Hun Lee; Bohm-Jung Yang
Publication Date
2023-06
Journal
Physical Review B, v.107, no.22
Publisher
American Physical Society
Abstract
In this work, we show that a buckled honeycomb lattice can host a boundary-obstructed topological superconductor (BOTS) in the presence of f-wave spin-triplet pairing (fSTP). The underlying buckled structure allows for the manipulation of both chemical potential and sublattice potential using a double gate setup. Although a finite sublattice potential can stabilize the fSTP with a possible higher-order band topology, because it also breaks the relevant symmetry, the stability of the corner modes is not guaranteed. Here we show that the fSTP on the honeycomb lattice gives a BOTS under nonzero sublattice potential, thus the corner modes can survive as long as the boundary is gapped. Also, by examining the large sublattice potential limit where the honeycomb lattice can be decomposed into two triangular lattices, we show that the boundary modes in the normal state are the quintessential ingredient leading to the BOTS. Thus the effective boundary Hamiltonian becomes nothing but the Hamiltonian for Kitaev chains, which eventually gives the corner modes of the BOTS. © 2023 American Physical Society.
URI
https://pr.ibs.re.kr/handle/8788114/13726
DOI
10.1103/PhysRevB.107.224511
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse