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JOURNALS // Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki // Archive

Pis'ma v Zh. Èksper. Teoret. Fiz., 2002 Volume 75, Issue 7, Pages 419–424 (Mi jetpl3076)

This article is cited in 8 papers

CONDENSED MATTER

Excitations in quantum hall ferromagnet with strong Coulomb interaction

S. V. Iordanskii, A. B. Kashuba

L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences

Abstract: Quantum Hall ferromagnet is considered at integer fillings $\nu$ provided typical Coulomb interaction energy $E_c$ is large compared to the cyclotron energy $\omega_H$. Low energy collective modes consist of magnetoplasmon exciton and gapeless spin exciton. All charged excitations have a gap. The activation energy gap for a pair of charged topological excitations — skyrmion and antiskyrmion — is small $\Delta = \nu\omega_H$. Electric charge of skyrmion is multiple $q=e\nu Q$, where $Q$ is the integer topological charge.

PACS: 71.27.+a, 73.43.-f

Received: 07.03.2002

Language: English


 English version:
Journal of Experimental and Theoretical Physics Letters, 2002, 75:7, 348–353

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