The optical conductivity of gauge field model

David M.T. Kuo, C. D. Hu

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)642-645
Number of pages4
JournalChinese Journal of Physics
Issue number2 II
StatePublished - 1996


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