The nonlocal transport and switch effect in light- and electric-controlled silicene–superconductor hybrid structure**Project supported by the National Natural Science Foundation of China (Grant Nos. 11504084 and 11647164) and the Natural Science Foundation for Colleges and Universities in Jiangsu Province, China (Grant Nos. 18KJB140005, 17KJD170004, and 16KJB140008).

Abstract

We theoretically investigate the influence of off-resonant circularly polarized light field and perpendicular electric field on the quantum transport in a monolayer silicene-based normal/superconducting/normal junction. Owing to the tunable band structure of silicene, a pure crossed Andreev reflection process can be realized under the optical and electrical coaction. Moreover, a switch effect among the exclusive crossed Andreev reflection, the exclusive elastic cotunneling and the exclusive Andreev reflection, where the former two are the nonlocal transports and the third one is the local transport, can be obtained in our system by the modulation of the electric and light fields. In addition, the influence of the relevant parameters on the nonlocal and local transports is calculated and analyzed as well.