马约拉纳
超导电性
物理
磁场
凝聚态物理
拓扑(电路)
梅斯纳效应
零(语言学)
拓扑绝缘体
量子力学
语言学
哲学
数学
组合数学
作者
Xiaohong Pan,Li Chen,Dong E. Liu,Fuchun Zhang,Xin Liu
标识
DOI:10.1103/physrevlett.132.036602
摘要
One key difficulty in realizing Majorana zero modes (MZMs) is the required high magnetic field, which causes serious issues, e.g., shrinks the superconducting gap, reduces topological region, and weakens their robustness against disorders. In this Letter, we propose that the Meissner effect can bring the topological superconducting phase to a superconductor/topological-insulator/superconductor (SC/TI/SC) hybrid system. Remarkably, the required magnetic field strength ($<10\text{ }\text{ }\mathrm{mT}$) to support MZMs has been reduced by several orders of magnitude compared to that ($>0.5\text{ }\text{ }\mathrm{T}$) in the previous schemes. Tuning the phase difference between the top and bottom superconductors can control the number and position of the MZMs. In addition, we account for the electrostatic potential in the superconductor/topological-insulator (SC/TI) interface through the self-consistent Schr\"odinger-Poisson calculation, which shows the experimental accessibility of our proposal. Our proposal only needs a small magnetic field of less than 10 mT and is robust against the chemical potential fluctuation, which makes the SC/TI/SC hybrid an ideal Majorana platform.
科研通智能强力驱动
Strongly Powered by AbleSci AI