Persistent current in a correlated quantum ring with electron-phonon interaction in the presence of Rashba interaction and Aharonov-Bohm flux

Persistent current in a correlated quantum ring threaded by an Aharonov-Bohm flux is studied in the presence of electron-phonon interactions and Rashba spin-orbit coupling. The quantum ring is modeled by the Holstein-Hubbard-Rashba Hamiltonian and the energy is calculated by performing the conventio...

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Bibliographic Details
Published in:Scientific reports 2016-02, Vol.6 (1), p.20056-20056, Article 20056
Main Authors: Monisha, P. J., Sankar, I. V., Sil, Shreekantha, Chatterjee, Ashok
Format: Article
Language:English
Subjects:
639/766/119/1001
639/766/119/995
639/925/357/1016
639/925/357/995
Chemical potential
Fluctuations
Humanities and Social Sciences
multidisciplinary
Science
Temperature effects
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Summary:Persistent current in a correlated quantum ring threaded by an Aharonov-Bohm flux is studied in the presence of electron-phonon interactions and Rashba spin-orbit coupling. The quantum ring is modeled by the Holstein-Hubbard-Rashba Hamiltonian and the energy is calculated by performing the conventional Lang-Firsov transformation followed by the diagonalization of the effective Hamiltonian within a mean-field approximation. The effects of Aharonov-Bohm flux, temperature, spin-orbit and electron-phonon interactions on the persistent current are investigated. It is shown that the electron-phonon interactions reduce the persistent current, while the Rashba coupling enhances it. It is also shown that temperature smoothens the persistent current curve. The effect of chemical potential on the persistent current is also studied.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep20056