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Topological states at domain walls

Published on:

15 November 2023

Primary Category:

Mesoscale and Nanoscale Physics

Paper Authors:

Sang-Hoon Han,

Myungjun Kang,

Moon Jip Park,

Sangmo Cheon

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Key Details

Topological states like polarization and Majorana modes can occur at domain walls of trivial systems

Quantized Berry phase differences confirm non-trivial nature of domain-wall states

Concept demonstrated in generalized SSH and Kitaev models

Applicable across tenfold classification table for topological insulators/superconductors

Realizable in condensed matter and optical systems

AI generated summary

Topological states at domain walls

This paper demonstrates that topological domain-wall states can emerge even in systems classified as topologically trivial, manifesting as quantized electric polarization and Majorana zero modes. The authors show that a zero-energy domain-wall state can possess quantized polarization, confirmed by quantized Berry phase differences between domains. This concept is extended to a superconducting system, resulting in Majorana zero modes at a domain wall. Potential realizations span condensed matter to optics.

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