Density matrix renormalization group study of optical conductivity in the one-dimensional Mott insulator Sr2CuO3

Article

关键词: T-J MODEL;    ABSORPTION;    CHAINS;   

DOI  :  10.1103/PhysRevB.82.195130

来源: SCIE

【 摘 要 】

Applying newly developed dynamical density matrix renormalization group techniques at zero and finite temperatures to a Hubbard-Holstein model at half filling, we examine the optical conductivity of a typical one-dimensional Mott insulator Sr2CuO3. We find a set of parameters in the Hubbard-Holstein model, which can describe optical conductivity for both Mott-gap excitation in the high-energy region and phonon-assisted spin excitation in the low-energy region. We also find that electron-phonon interaction gives additional broadening in the temperature dependence of the Mott-gap excitation.

【 授权许可】

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