Persistent current and the existence of a metallic phase flanked by two insulating phases in a quantum ring with both electron-electron and electron-phonon interactions

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dc.contributor.author Sankar, I. V.
dc.contributor.author Monisha, P. J.
dc.contributor.author Sil, Shreekantha
dc.contributor.author Chatterjee, Ashok
dc.date.accessioned 2022-03-27T11:51:53Z
dc.date.available 2022-03-27T11:51:53Z
dc.date.issued 2015-06-18
dc.description.abstract The persistent current in the ground state of a quantum ring threaded by a magnetic flux is calculated within the framework of the Holstein-Hubbard model. It is found that the persistent current is suppressed by both the electron-electron and electron-phonon interactions. Calculation of Drude weight reveals that the persistent current is diamagnetic in nature. It is observed that as the number of atoms in the quantum ring increases, the persistent current decays in a continuous way. It is finally predicted that there exists an intervening metallic phase flanked in real time by two insulating phases, the SDW phase and the CDW phase.
dc.identifier.citation Physica E: Low-Dimensional Systems and Nanostructures. v.73
dc.identifier.issn 13869477
dc.identifier.uri 10.1016/j.physe.2015.05.029
dc.identifier.uri https://www.sciencedirect.com/science/article/abs/pii/S1386947715300643
dc.identifier.uri https://dspace.uohyd.ac.in/handle/1/14886
dc.subject CDW and SDW phases
dc.subject Holstein-Hubbard model
dc.subject Persistent current
dc.subject Quantum ring
dc.title Persistent current and the existence of a metallic phase flanked by two insulating phases in a quantum ring with both electron-electron and electron-phonon interactions
dc.type Journal. Article
dspace.entity.type
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