Volume 130, Number 1, April 2020
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||30 April 2020|
Anisotropic Andreev reflection across a borophane-based superconducting junction
1 School of Electronic and Information Engineering, Jinling Institute of Technology - Nanjing, 211169, China
2 New Energy Technology Engineering Laboratory of Jiangsu Province, School of Science, Nanjing University of Posts and Telecommunications - Nanjing, 210023, China
Received: 28 February 2020
Accepted: 17 April 2020
We investigate the Andreev reflection across a borophane-based superconducting junction in different directions of junction. There are three exotic properties which are different from the ones in graphene. Firstly, the Andreev retro-reflection happens in the interband conversion of electron-hole. Secondly, the electron-hole conversion in the intraband leads to the specular Andreev reflection. Thirdly, the perfect Andreev reflection, the electron-hole conversion with unit efficiency, happens at a nonzero incident angle of electron. These three unique properties arise from the anisotropic band structure of borophane and can be modulated by adjusting the direction of junction. Our findings give a new perspective for understanding Andreev reflection.
PACS: 74.45.+c – Proximity effects; Andreev reflection; SN and SNS junctions / 73.23.-b – Electronic transport in mesoscopic systems / 73.40.-c – Electronic transport in interface structures
© EPLA, 2020
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