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arXiv · 2408.15826

Topological inverse Anderson insulator

Zheng-Wei Zuo·Jing-Run Lin·Dawei Kang
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Abstract

A different type of topological phase dubbed topological inverse Anderson insulators is proposed, which is characterized by the disorder-induced extended bulk states from the flat-band localization and topological edge states. Based on the topological invariant, the behaviors of the localization length of the zero-energy modes, and quantum transport, we identify its existence in several all-band-flat models with the disordered potentials or hopping including the $\pi$-flux Creutz ladder, the fully dimerized Su-Schrieffer-Heeger chain, and $\pi$-flux diamond chain. Unlike the topological Anderson insulator, where disorder induces localization and exponential suppression of transport, the disorder-assisted quantum ballistic coherent transport can appear in the topological inverse Anderson insulator. In addition, our proposal and results could be realized by the current experimental techniques.

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Zheng-Wei Zuo, Jing-Run Lin, Dawei Kang. 2024-08-28. Topological inverse Anderson insulator. https://doi.org/10.1103/physrevb.110.085157

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