Localization of Spinwaves in the Quantum Hall Ferromagnet'

Andrew Green

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The topological nature of the quantized Hall plateau has a number of remarkable consequences. For the quantum Hall ferromagnet (QHF), it leads to the identification of the topological charge density of a spin distortion with the associated electrical charge density. Spin waves may couple to a scalar disorder potential via their topological density. This interaction is very similar to minimal coupling of quantum particles to a random fur. It leads to the localization of spin waves in the QHF. We derive a low-energy description of the system in terms of a nonlinear sigma-model of unitary supermatrices. A possible experimental signature of these effects in photoemission is suggested.

Original languageEnglish
Pages (from-to)5104-5107
Number of pages4
JournalPhysical Review Letters
Volume82
Publication statusPublished - 21 Jun 1999

Keywords

  • OPTICALLY PUMPED NMR
  • ELECTRON LOCALIZATION
  • LANDAU-LEVEL
  • SKYRMIONS
  • WELLS
  • NU=1
  • EXCITATIONS
  • INTEGER
  • FIELD

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