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APS » Journals » Phys. Rev. Lett. » Volume 77 » Issue 8
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Phys. Rev. Lett. 77, 1572–1575 (1996)

Internal Excitations and Dissipative Damping of Quantum Hall Skyrmions

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H. A. Fertig1, L. Brey2, R. Côté3, and A. H. MacDonald4
1Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055.
2Instituto de Ciencia de Materiales (CSIC), Universidad Autónoma C-12, 28049 Madrid, Spain
3Université de Sherbrooke, Département de Physique, Sherbrooke, Québec, Canada J1K 2R1
4Department of Physics, Indiana University, Bloomington, Indiana 47405

Received 1 May 1996; published in the issue dated 19 August 1996

We propose an intrinsic maximum speed for dissipationless E cross B drift of Skyrmion quasiparticles in quantum Hall ferromagnets. When this speed is exceeded, Skyrmions can radiate spin waves by making internal excitations which allow total spin to be conserved. Our proposal is illustrated by a time-dependent Hartree-Fock approximation calculation of the excitation spectrum for a Skyrmion bound to an impurity.

© 1996 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.1572
DOI:
10.1103/PhysRevLett.77.1572
PACS:
73.40.Hm, 73.20.Mf, 75.30.Ds
 
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