The Optical Conductivity of Gauge Field Model

David M. T. Kuo；C. D. Hu

Chinese Journal of Physics

34卷2S期（1996 / 04 / 01）

642 - 645

英文

The thermal Green's function method has been used to calculate the real part of the optical conductivity in the gauge-field model. The gauge invariant response functions were considered to the second order of the gauge field. We found that there is a structure in the frequecy range of a fraction of the Fermi energy. It is due to the excitation of particle-hole pair and a gauge field by a photon. In the small-frequency region, the optical conductivity is sensitive to temperature because' of boson excitations. In the intermediate and high frequency region it is not sensitive because fermion excitations dominates.

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