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Phys. Rev. B 69, 121304(R) (2004) [4 pages]

Massive spin collective mode in a quantum Hall ferromagnet

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T. Maniv1,2, Yu. A. Bychkov1,3, and I. D. Vagner1,4
1Grenoble High Magnetic Field Laboratory, Max-Planck-Institute fur Festkorperforschung and CNRS, Grenoble, France
2Chemistry Department, Technion-Israel Institute of Technology, Haifa 32000, Israel
3L. D. Landau Institute for Theoretical Physics, Kosygina 2, Moscow, Russia
4RCQCE at the Department of Communication Engineering, Holon Academic Institute of Technology, 52 Golomb str., 58102 Holon, Israel

Received 25 November 2003; published 16 March 2004

It is shown that the collective spin rotation of a single Skyrmion in a quantum Hall ferromagnet can be regarded as precession of the entire spin texture in the external magnetic field, with an effective moment of inertia which becomes infinite in the zero g-factor limit. This low-lying spin excitation may dramatically enhance the nuclear spin relaxation rate via the hyperfine interaction in the quantum well slightly away from filling factor ν=1.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.121304
DOI:
10.1103/PhysRevB.69.121304
PACS:
73.43.Lp, 12.39.Dc, 71.70.Di, 76.60.-k
 
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