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Two-dimensional Dirac fermions with random axial-vector potential

T. Fukui, H. Emura, H. Yamada

cond-mat.dis-nnarXiv:cond-mat/0201305

Abstract

A Dirac fermion model with random axial-vector potential is proposed. At a special strength of randomness, the symmetry of the action is enhanced, which is due to the gauge symmetry à la Nishimori. Some exact scaling exponents of single-particle Green functions are computed. The relationship with the XY gauge glass model is discussed.

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