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arXiv · 1803.08545

Majorana corner modes in a high-temperature platform

Zhongbo Yan·Fei Song·Zhong Wang
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Abstract

We introduce two-dimensional topological insulators in proximity to high-temperature cuprate or iron-based superconductors as high-temperature platforms of Majorana Kramers pairs of zero modes. The proximity-induced pairing at the helical edge state of the topological insulator serves as a Dirac mass, whose sign changes at the sample corner because of the pairing symmetry of high-$T_c$ superconductors. This sign changing naturally creates at each corner a pair of Majorana zero modes protected by time-reversal symmetry. Conceptually, this is a topologically trivial superconductor-based approach for Majorana zero modes. We provide quantitative criteria and suggest candidate materials for this proposal.

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Zhongbo Yan, Fei Song, Zhong Wang. 2018-03-22. Majorana corner modes in a high-temperature platform. https://doi.org/10.1103/physrevlett.121.096803

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