Josephson current in a quantum dot coupled to a topological superconducting α-helical protein

We investigate the topological properties of a topological superconducting α-helical protein. It is shown that the Majorana zero modes can be formed at both ends of the topological superconducting α-helical protein with non-trivial phase. Our results indicate that the gate field can affect the topol...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2021-07, Vol.127 (7), Article 516
Main Authors: Tang, Han-Zhao, Ding, Guan-Jun, Guo, Xue-Wen
Format: Article
Language:English
Subjects:
Applied physics
Characterization and Evaluation of Materials
Condensed Matter Physics
Machines
Manufacturing
Materials science
Nanotechnology
Optical and Electronic Materials
Phase transitions
Physics
Physics and Astronomy
Processes
Proteins
Quantum dots
Superconductivity
Surfaces and Interfaces
Thin Films
Topology
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Summary:We investigate the topological properties of a topological superconducting α-helical protein. It is shown that the Majorana zero modes can be formed at both ends of the topological superconducting α-helical protein with non-trivial phase. Our results indicate that the gate field can affect the topological phase. Employing Green’s function method, we investigate the Josephson current through a quantum dot side coupled to a topological superconducting α-helical protein. Due to leakage of the Majorana zero mode, the Josephson current shows a trivial/non-trivial phase transition. The results can be used to probe the existence of the Majorana zero mode in protein.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-021-04643-1