Green, AG;
(1999)
Localization of spin waves in the quantum Hall ferromagnet.
PHYS REV LETT
, 82
(25)
5104 - 5107.
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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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1333468 |
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