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】
Free