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RYU, Jung-Wan
복잡계 이론물리 연구단
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Topological edge states in bowtie ladders with different cutting edges

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Title
Topological edge states in bowtie ladders with different cutting edges
Author(s)
Jung-Wan Ryu; Sungjong Woo; Myoung, Nojoon; Hee Chul Park
Publication Date
2022-03
Journal
Physica E: Low-Dimensional Systems and Nanostructures, v.137
Publisher
Elsevier BV
Abstract
© 2021 Elsevier B.V.We have studied topological edge states in bowtie ladders with various edge truncations. The symmetric bowtie ladder, which comprises two trivial Su–Schrieffer–Heeger (SSH) lattices, exhibits an insulator–metal transition with trivial insulating states. On the other hand, the lattice can be transformed into an extended SSH lattice depending on the edge shapes with non-trivial insulating states in that the winding number is non-zero. The winding numbers are permutationally designated in the phase diagram depending on the choice of unit cell. The topological edge states are affected by the shape of the edge and the corresponding winding number. We also studied general bowtie ladder models with richer phase diagrams using the characteristics of the localization length of the edge states showing state bifurcation.
URI
https://pr.ibs.re.kr/handle/8788114/11014
DOI
10.1016/j.physe.2021.114941
ISSN
1386-9477
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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