Induced Magnetic moments in three-dimensional gauge theories with external magnetic fields

Details Induced Magnetic moments in three-dimensional gauge theories with external magnetic fields Induced Magnetic moments in three-dimensional gauge theories with external magnetic fields

1998-02-17

arxiv.org/abs/hep-th/9802119v2

Mod.Phys.Lett. A13 (1998) 1765-1780

Physics

High Energy Physics

High Energy Physics - Theory

15 pages revtex, one figure incorporated, References added no other changes

Scientific paper

10.1142/S0217732398001844

We study the appearance of induced parity-violating magnetic moment, in the presence of external magnetic fields, for even-number of fermion species coupled to dynamical fields in three dimensions. Specifically, we use a SU(2)xU(1) gauge model for dynamical gauge symmetry breaking, which is also proposed recently as a field theoretical model for high-temperature superconductors. By decomposing the fermionic degrees of freedom in terms of Landau levels, we show that, in the effective theory with the lowest Landau levels, a parity-violating magnetic moment interaction is induced by the higher Landau levels when the fermions are massive. The possible relevance of this result for a recently observed phenomenon in high-temperature superconductors is also discussed.

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