Interference effect on the Andreev reflections induced by Majorana bound states

Tong Gong; Xue-Feng Dai; Lian-Lian Zhang; Cui Jiang; Wei-Jiang Gong

doi:10.1088/1361-648X/abe651

Interference effect on the Andreev reflections induced by Majorana bound states

J Phys Condens Matter. 2021 May 3;33(21). doi: 10.1088/1361-648X/abe651.

Authors

Tong Gong¹, Xue-Feng Dai¹, Lian-Lian Zhang¹, Cui Jiang², Wei-Jiang Gong¹

Affiliations

¹ College of Sciences, Northeastern University, Shenyang 110819, People's Republic of China.
² Basic Department, Shenyang Institute of Engineering, Shenyang, 110136, People's Republic of China.

PMID: 33588382
DOI: 10.1088/1361-648X/abe651

Abstract

We investigate the effect of quantum interference on the Andreev reflections (ARs) induced by Majorana bound states (MBSs), by considering their additional coupling via a quantum-dot molecule. It is found that due to the direct and indirect couplings of MBSs, a quantum ring is constructed in this system. Consequently, the interference effect makes important contribution to the ARs, especially in the presence of the local magnetic flux. All the results are manifested as the tight dependence of the differential conductance and Fano factors on the magnetic flux phase factor, dot-MBS couplings, and the dot level, respectively. Moreover, at the zero-bias limit, the magnitudes of the Fano factors and their relation can be efficiently altered by the interference properties. We believe that quantum interference is important for manipulating the Andreev reflection behaviors of the MBSs.

Keywords: Fano factor; Majorana bound states; conductance; interference effect.