title: Persistent current in a correlated quantum ring with electron-phonon interaction in the presence of Rashba interaction and Aharonov-Bohm flux.
abstract: 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.
authors.affiliation: School of Physics, University of Hyderabad, Hyderabad 500046, India.
authors.forename: P J
authors.initials: PJ
authors.lastname: Monisha
authors.affiliation: School of Physics, University of Hyderabad, Hyderabad 500046, India.
authors.forename: I V
authors.initials: IV
authors.lastname: Sankar
authors.affiliation: Department of Physics, Visva-Bharati-Santiniketan, West Bengal-731235, India.
authors.forename: Shreekantha
authors.initials: S
authors.lastname: Sil
authors.affiliation: School of Physics, University of Hyderabad, Hyderabad 500046, India.
authors.forename: Ashok
authors.initials: A
authors.lastname: Chatterjee
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