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Precursors to Topological Phase Transition in Topological Ladders
Version 1
: Received: 20 November 2023 / Approved: 20 November 2023 / Online: 20 November 2023 (16:15:50 CET)
How to cite: Han, S.; Choi, M.-S. Precursors to Topological Phase Transition in Topological Ladders. Preprints 2023, 2023111255. https://doi.org/10.20944/preprints202311.1255.v1 Han, S.; Choi, M.-S. Precursors to Topological Phase Transition in Topological Ladders. Preprints 2023, 2023111255. https://doi.org/10.20944/preprints202311.1255.v1
Abstract
We study the coupling of two topologcal subsystems in distinct topological states, and show that it leads to a precursor behavior of the topological phase transition in the overall system. This behavior is solely determined by the symmetry classes of the subsystem Hamiltonians and coupling terms, and is marked by the persistent existence of subgap states within the bulk energy gap.
By investigating the critical current of Josephson junctions involving topological superconductors, we also illustrate that such subgap states play crucial roles in physical properties of nanoscale devices or materials.
Keywords
topological insulator; topological supercondcutors; zero-energy edge states; suggap states
Subject
Physical Sciences, Condensed Matter Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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