Magnetoresistance study for systems of interacting electrons in two dimensions

Jan W. Kantelhardt, Richard Berkovits, Yshai Avishai

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2 Scopus citations


The influence of Coulomb interaction and weak perpendicular magnetic field on the transport properties of spinless electrons in small disordered two dimensional systems is studied within a tight binding model. We trace the participation ratio of the renormalized zero-temperature tunneling amplitude as function of interaction strength U and magnetic field H, and find typical negative magnetoresistance for small disorder, while the behavior is more complicated for stronger disorder. The results suggest an effective weakening of the magnetic field for stronger Coulomb interaction in agreement with previous results for quantum dots.

Original languageEnglish
Pages (from-to)359-367
Number of pages9
JournalPhysica A: Statistical Mechanics and its Applications
Issue number1-4
StatePublished - 15 Dec 2001
EventInternational Workshop on Frontiers in the Physics of Complex Systems - Ramat-Gan, Israel
Duration: 25 Mar 200128 Mar 2001

Bibliographical note

Funding Information:
We would like to thank the Minerva Foundation for financial support. JK and RB are indebted to the NEC Research Institute, Princeton, and Prof. B. Altshuler for hospitality during a visit.


  • Coulomb interaction
  • Exact diagonalization
  • Magnetoresistance
  • Tunneling amplitude
  • Weak localization


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