Bag Formation in Quantum Hall Ferromagnets

Details Bag Formation in Quantum Hall Ferromagnets Bag Formation in Quantum Hall Ferromagnets

2000-08-21

arxiv.org/abs/cond-mat/0008297v1

Physics

Condensed Matter

13 pages, 3 figures

Scientific paper

10.1103/PhysRevB.63.075310

Charged skyrmions or spin-textures in the quantum Hall ferromagnet at filling factor nu=1 are reinvestigated using the Hartree-Fock method in the lowest Landau level approximation. It is shown that the single Slater determinant with the minimum energy in the unit charge sector is always of the hedgehog form. It is observed that the magnetization vector's length deviates locally from unity, i.e. a bag is formed which accommodates the excess charge. In terms of a gradient expansion for extended spin-textures a novel O(3) type of effective action is presented, which takes bag formation into account.

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