2018/03/31 by Zhongbo Yan, Fei Song, Zhong Wang · 1 citation
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.quant-gas #cond-mat.str-el #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.1103/physrevlett.121.096803
published as Phys. Rev. Lett. 121, 096803 (2018) · 15 pages, 9 figures, including supplemental material. Published version
arxiv created 2018/08/31 · arxiv updated 2018/09/03
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-Tc 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.