Electrostatic effects of MnBi2Te4 -superconductor heterostructures in the chiral Majorana search
Electrostatic effects of MnBi2Te4 -superconductor heterostructures in the chiral Majorana search
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DOI：
10.1103/physrevb.107.165405
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发表时间：
2022-11
影响因子：
3.7
通讯作者：
L. Chen;Zhan-qiang Cao;K. He;Xin Liu;Dong Liu
中科院分区：
文献类型：
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作者：
L. Chen;Zhan-qiang Cao;K. He;Xin Liu;Dong Liu
The realization of chiral Majorana modes is a challenging task. We aim to comprehend the phase diagrams and parameter control capabilities of the actual devices used in the chiral Majorana search. Beyond the well-known minimal models, we develop a numerical simulation scheme using a self-consistent Schrodinger-Poisson approach to study, as an example, the MnBi2Te4 thin film coupled to an s-wave superconductor. We show that both the superconducting proximity effect and the tunability of the chemical potential for the topological surface states are significantly influenced by the gate-induced electrostatic potential. This complicates the implementation in experiments, and the actual topological region will be narrowed in stark contrast to those predicted in the previous minimal models. Nevertheless, we demonstrate that the chiral Majorana mode still exists in a wide range of experimental parameters with practical tunability.
