Analysis of optical conductivities of cuprates via doped Hubbard model

Hsin Lin

W. Brenig

Hae‐Young Kee, Jongbae Hong

Analysis of optical conductivities measured for cuprates has been done via the doped Hubbard model in infinite dimensions using the analytical variant of the dynamic Lanczos method. We examine the frequency behavior in the low-frequency region at comparatively large doping, the midinfrared band, and the isobestic point in the optical conductivity of cuprates. We demonstrate that these features shown in infinite dimensions are the generic features of strong correlation.

Giang H. Bach, Jorge G. Hirsch, F. Marsiglio

Mark Jarrell, James K. Freericks, Thomas Pruschke

A Monte Carlo maximum-entropy calculation of the optical conductivity of the infinite-dimensional Hubbard model is presented. We show that the optical conductivity displays the anomalies found in the cuprate superconductors, including a Drude width which grows linearly with temperature, a Drude weight which grows linearly with doping, and a temperature and doping-dependent mid-IR peak. These anomalies arise as a consequence of the dynamical generation of a quasiparticle band at the Fermi energy as T\ensuremath{\rightarrow}0, and are a generic property of the strongly correlated Hubbard model in all dimensions greater than one.

Jaroslav Fabian