Quantized persistent currents in quantum dot at strong magnetic field

Y. Avishai, M. Kohmoto

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We investigate equilibrium electron currents and magnetization in an ideal two-dimensional disk of radius R placed in a strong magnetic field H. The most striking results emerge when the conditions for the existence of edge and bulk states are met, namely, RaH=(Latin small letter h with strokec/eH)1/2. When the Fermi energy is locked on a Landau level, the current as a function of electron density is quantized in units of (e/h)Latin small letter h with strokeωc/2, where ωc is the cyclotron frequency. We argue that this effect survives against weak disorder. It is also shown that the persistent current has an approximately periodic dependence on 1/H.

Original languageEnglish
Pages (from-to)279-282
Number of pages4
JournalPhysical Review Letters
Volume71
Issue number2
DOIs
StatePublished - 1 Jan 1993

ASJC Scopus subject areas

  • General Physics and Astronomy

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