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Title: Tunable transport through a quantum dot chain with side-coupled Majorana bound states

Abstract

We investigate the transport properties of a quantum dot (QD) chain side-coupled to a pair of Majorana bound states (MBSs). It is found that the zero-bias conductance is tightly dependent on the parity of QD number. First, if a Majorana zero mode is introduced to couple to one QD of the odd-numbered QD structure, the zero-bias conductance is equal to (e{sup 2})/(2h) , but the zero-bias conductance will experience a valley-to-peak transition if the Majorana zero mode couples to the different QDs of the even-numbered QD structure. On the other hand, when the inter-MBS coupling is nonzero, the zero-bias conductance spectrum shows a peak in the odd-numbered QD structure, and in the even-numbered QD structure one conductance valley appears at the zero-bias limit. These results show the feasibility to manipulate the current in a multi-QD structure based on the QD-MBS coupling. Also, such a system can be a candidate for detecting the MBSs.

Authors:
;  [1];  [2]
  1. Department of Basic, Shenyang University of Technology, Liaoyang 111003 (China)
  2. College of Sciences, Northeastern University, Shenyang 110819 (China)
Publication Date:
OSTI Identifier:
22305949
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 116; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BOUND STATE; COUPLING; CURRENTS; ELECTRIC CONDUCTIVITY; MAJORANA THEORY; PARITY; QUANTUM DOTS; SPECTRA

Citation Formats

Jiang, Cui, Lu, Gang, and Gong, Wei-Jiang. Tunable transport through a quantum dot chain with side-coupled Majorana bound states. United States: N. p., 2014. Web. doi:10.1063/1.4895052.
Jiang, Cui, Lu, Gang, & Gong, Wei-Jiang. Tunable transport through a quantum dot chain with side-coupled Majorana bound states. United States. doi:10.1063/1.4895052.
Jiang, Cui, Lu, Gang, and Gong, Wei-Jiang. Sun . "Tunable transport through a quantum dot chain with side-coupled Majorana bound states". United States. doi:10.1063/1.4895052.
@article{osti_22305949,
title = {Tunable transport through a quantum dot chain with side-coupled Majorana bound states},
author = {Jiang, Cui and Lu, Gang and Gong, Wei-Jiang},
abstractNote = {We investigate the transport properties of a quantum dot (QD) chain side-coupled to a pair of Majorana bound states (MBSs). It is found that the zero-bias conductance is tightly dependent on the parity of QD number. First, if a Majorana zero mode is introduced to couple to one QD of the odd-numbered QD structure, the zero-bias conductance is equal to (e{sup 2})/(2h) , but the zero-bias conductance will experience a valley-to-peak transition if the Majorana zero mode couples to the different QDs of the even-numbered QD structure. On the other hand, when the inter-MBS coupling is nonzero, the zero-bias conductance spectrum shows a peak in the odd-numbered QD structure, and in the even-numbered QD structure one conductance valley appears at the zero-bias limit. These results show the feasibility to manipulate the current in a multi-QD structure based on the QD-MBS coupling. Also, such a system can be a candidate for detecting the MBSs.},
doi = {10.1063/1.4895052},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 10,
volume = 116,
place = {United States},
year = {2014},
month = {9}
}