Optical conductivity of one-dimensional doped Hubbard-Mott insulator
D. N. Aristov, Vadim V. Cheianov, A. Luther
Abstract
We study the optical response of a strongly correlated electron system near the metal-insulator transition using a mapping to the sine-Gordon model. With semiclassical quantization, the spectral weight is distributed between a Drude peak and absorption lines due to breathers. We calculate the Drude weight, the optical gap, and the lineshape of breather absorption.
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