Work

Selective bulk-boundary correspondence in higher-order topological insulators with anticommuting mirror and chiral symmetries

Year: 2025

Type: preprint

Abstract: We investigate higher-order topological insulators protected by chiral and anticommuting mirror symmetries. Using models in the BDI class, which include the prototypical topological quadrupole insulator, we show that breaking mirror symmetries that anticommute with the chiral operator leads to edge-selective bulk-boundary correspondence, with gap closings and bound states appearing only along a subset of boundaries of the same orientation and codimension. We define a new edge-sensitive topological invariant that distinguishes this mechanism from previous reports of non-topological edge-selection effects.

Source: arXiv (Cornell University)

DOI: 10.1103/8131-lbc3

Authors: Aich, Suman, Seradjeh, Babak

Institutions: Indiana University Bloomington, Indiana University

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Division of Materials Research

Award: EAGER: Novel Dynamics of Locally-Driven Quantum Systems

OpenAlex ID: W7083843929

Cites:

Cited by:

Related to: