Paradoxical extension of the edge states across the topological phase transition due to emergent approximate chiral symmetry in a quantum anomalous Hall system

AbstractWe theoretically report the finding of a new kind of topological phase transition between a normal insulator and a topological metal state where the closing-reopening of bandgap is accompanied by passing the Fermi level through an additional band. The resulting nontrivial topological metal phase is characterized by stable zero-energy localized edge states that exist within the full gapless bulk states. Such states living on a quasi-one-dimensional system with three sublattices per unit cell are protected by hidden inversion symmetry. While other required symmetries such as chiral, particle-hole, or full inversion symmetry are absent in the system.

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Topological phase transition and quantum spin Hall edge states of antimony few layers

Scientific Reports ◽

10.1038/srep33193 ◽

2016 ◽

Vol 6 (1) ◽

Cited By ~ 24

Author(s):

Sung Hwan Kim ◽

Kyung-Hwan Jin ◽

Joonbum Park ◽

Jun Sung Kim ◽

Seung-Hoon Jhi ◽

...

Keyword(s):

Phase Transition ◽

Quantum Spin ◽

Topological Phase ◽

Edge States ◽

Topological Phase Transition ◽

Quantum Spin Hall

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Topological phase transition and evolution of edge states in In-rich InGaN/GaN quantum wells under hydrostatic pressure

Journal of Physics Condensed Matter ◽

10.1088/1361-648x/29/5/055702 ◽

2016 ◽

Vol 29 (5) ◽

pp. 055702 ◽

Cited By ~ 2

Author(s):

S P Łepkowski ◽

W Bardyszewski

Keyword(s):

Phase Transition ◽

Hydrostatic Pressure ◽

Quantum Wells ◽

Topological Phase ◽

Edge States ◽

Topological Phase Transition

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Prediction of topological phase transition in X2–SiGe monolayers

Physical Chemistry Chemical Physics ◽

10.1039/c5cp06527e ◽

2016 ◽

Vol 18 (5) ◽

pp. 3669-3674 ◽

Cited By ~ 6

Author(s):

Rosalba Juarez-Mosqueda ◽

Yandong Ma ◽

Thomas Heine

Keyword(s):

Phase Transition ◽

Quantum Spin ◽

Topological Phase ◽

Edge States ◽

Topological Phase Transition ◽

Nontrivial Topology ◽

Quantum Spin Hall

Quantum spin Hall (QSH) insulators exhibit a bulk insulting gap and metallic edge states characterized by nontrivial topology.

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Topological Phase Transition Between Normal Insulator and Topological Metal State in a Quasi-one-dimensional System

10.21203/rs.3.rs-279154/v1 ◽

2021 ◽

Author(s):

Milad Jangjan ◽

Mir Vahid Hosseini

Keyword(s):

Phase Transition ◽

Dimensional System ◽

Inversion Symmetry ◽

Topological Phase ◽

Edge States ◽

Zero Energy ◽

One Dimensional ◽

Topological Phase Transition ◽

Metal State ◽

Topological Metal

Abstract We theoretically report the finding of a new kind of topological phase transition between a normal insulator and topological metal state where the closing-reopening of bandgap is accompanied by passing the Fermi level through an additional band. The resulting nontrivial topological metal phase is characterized by stable zero-energy localized edge states that exist within the full gapless bulk states. Such states living on a quasi-one-dimensional system with three sublattices per unit cell are protected by hidden inversion symmetry. While other required symmetries such as chiral, particle-hole, or full inversion symmetry are absent in the system.

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