Significant interaction-induced enhancement of persistent currents in 2d disordered cylinders

R. Berkovits; Y. Avishai

doi:10.1209/0295-5075/29/6/008

Significant interaction-induced enhancement of persistent currents in 2d disordered cylinders

R. Berkovits, Y. Avishai

Department of Physics

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36 Scopus citations

Abstract

The persistent current of small disordered 2D cylinders is calculated by an exact numerical diagonalization of a tight-binding interacting model Hamiltonian. A significant enhancement in the ensemble-averaged persistent current amplitude occurs for a certain range of electron-electron interaction strength. For similar ID and quasi-ID geometries no significant enhancement is observed. This current enhancement is due to the shift of the onset point of the Mott-Hubbard metal insulator transition. Our results may provide an explanation to a longstanding problem in mesoscopic physics, namely, the high values of persistent current measured in experiment.

Original language	English
Pages (from-to)	475-480
Number of pages	6
Journal	EPL
Volume	29
Issue number	6
DOIs	https://doi.org/10.1209/0295-5075/29/6/008
State	Published - 20 Feb 1995

ASJC Scopus subject areas

General Physics and Astronomy

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10.1209/0295-5075/29/6/008

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abstract = "The persistent current of small disordered 2D cylinders is calculated by an exact numerical diagonalization of a tight-binding interacting model Hamiltonian. A significant enhancement in the ensemble-averaged persistent current amplitude occurs for a certain range of electron-electron interaction strength. For similar ID and quasi-ID geometries no significant enhancement is observed. This current enhancement is due to the shift of the onset point of the Mott-Hubbard metal insulator transition. Our results may provide an explanation to a longstanding problem in mesoscopic physics, namely, the high values of persistent current measured in experiment.",

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N2 - The persistent current of small disordered 2D cylinders is calculated by an exact numerical diagonalization of a tight-binding interacting model Hamiltonian. A significant enhancement in the ensemble-averaged persistent current amplitude occurs for a certain range of electron-electron interaction strength. For similar ID and quasi-ID geometries no significant enhancement is observed. This current enhancement is due to the shift of the onset point of the Mott-Hubbard metal insulator transition. Our results may provide an explanation to a longstanding problem in mesoscopic physics, namely, the high values of persistent current measured in experiment.

AB - The persistent current of small disordered 2D cylinders is calculated by an exact numerical diagonalization of a tight-binding interacting model Hamiltonian. A significant enhancement in the ensemble-averaged persistent current amplitude occurs for a certain range of electron-electron interaction strength. For similar ID and quasi-ID geometries no significant enhancement is observed. This current enhancement is due to the shift of the onset point of the Mott-Hubbard metal insulator transition. Our results may provide an explanation to a longstanding problem in mesoscopic physics, namely, the high values of persistent current measured in experiment.

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SP - 475

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JO - EPL

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Significant interaction-induced enhancement of persistent currents in 2d disordered cylinders

Abstract

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