https://doi.org/10.1140/epjb/s10051-024-00765-6
Regular Article - Mesoscopic and Nanoscale Systems
Shot noise in Majorana bound state modulated double-quantum-dot interferometer connected to normal and superconductive terminals
1
School of Physics and new Energy, Xuzhou University of Technology, 221018, Xuzhou, China
2
School of Physics, Beijing Institute of Technology, 100081, Beijing, China
Received:
24
November
2023
Accepted:
5
August
2024
Published online:
26
August
2024
The mesoscopic transport through double-quantum-dot (DQD) Aharonov–Bohm (AB) interferometer coupled with Majorana bound states (MBSs), as well as normal and superconductive terminals has been investigated. The current, shot noise and Fano factor have been calculated versus AB phase and source-drain bias (eV). The calculated Fano factor F displays explicit features of MBSs through its AB oscillations and source-drain bias characteristics. The sinusoid and multi-peak 
-periodic oscillations are exhibited versus AB phase due to modifying the DQD levels and coupling constants. Significant peak-valley structures of Fano factor contributed by Andreev reflections and MBSs exhibit in small source-drain bias region. The Fano factor is suppressed by increasing the coupling strengths 
(
) of MBSs with DQD, while it is enhanced by increasing the coupling energy (
) between two MBSs. For the case as 
, a specific value around 
is reached for different as 
. While for the case as 
, small values around 
are presented due to setting different coupling constants as .
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
