Interaction-induced magnetization of a two-dimensional electron gas

Journal Article

We consider the contribution of electron-electron interactions to the orbital magnetization of a two-dimensional electron gas, focusing on the ballistic limit in the regime of negligible Landau-level spacing. This regime can be described by combining diagrammatic perturbation theory with semiclassical techniques. At sufficiently low temperatures, the interaction-induced magnetization overwhelms the Landau and Pauli contributions. Curiously, the interaction-induced magnetization is third-order in the (renormalized) Coulomb interaction. We give a simple interpretation of this effect in terms of classical paths using a renormalization argument: a polygon must have at least three sides in order to enclose an area. To leading order in the renormalized interaction, the renormalization argument gives exactly the same result as the full treatment. © 2000 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • von Oppen, F; Ullmo, D; Baranger, HU

Published Date

  • January 1, 2000

Published In

Volume / Issue

  • 62 / 3

Start / End Page

  • 1935 - 1942

Electronic International Standard Serial Number (EISSN)

  • 1550-235X

International Standard Serial Number (ISSN)

  • 1098-0121

Digital Object Identifier (DOI)

  • 10.1103/PhysRevB.62.1935

Citation Source

  • Scopus