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Localization of spin waves in the quantum Hall ferromagnet

Green, AG; (1999) Localization of spin waves in the quantum Hall ferromagnet. PHYS REV LETT , 82 (25) 5104 - 5107. Green open access

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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.

Type: Article
Title: Localization of spin waves in the quantum Hall ferromagnet
Open access status: An open access version is available from UCL Discovery
Keywords: OPTICALLY PUMPED NMR, ELECTRON LOCALIZATION, LANDAU-LEVEL, SKYRMIONS, WELLS, NU=1, EXCITATIONS, INTEGER, FIELD
UCL classification: UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Maths and Physical Sciences
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1333468
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