Realization of topological phase in a chiral honeycomb lattice model

2024/07/31 by Genki Yonezawa, Yonezawa, Genki, Jun‐ichi Fukuda +3
Environmental Science · Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Methane Hydrates and Related Phenomena #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics

paper · pdf · doi:10.48550/arxiv.2407.21379

openalex publication_date 2024/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate topological properties of a chiral honeycomb lattice model with next-nearest-neighbor hoppings characterized by the reflection symmetry breaking. Topological nontriviality is detected by analyzing effective Dirac Hamiltonian, and confirmed by numerical and analytical study of the emergence of topological edge states at the boundaries between topologically distinct regions. We have also discovered that a novel asymmetric edge current attributable to chirality can be excited without any involved phase shifts in input sources to pick up one of the pseudospin components.

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