Optical Conductivity of the t-J model within Cluster Dynamical Mean Field Theory

Details Optical Conductivity of the t-J model within Cluster Dynamical Mean Field Theory Optical Conductivity of the t-J model within Cluster Dynamical Mean Field Theory

2006-01-20

arxiv.org/abs/cond-mat/0601478v1

Europhys Lett. 77, 27007 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1209/0295-5075/77/27007

We study the evolution of the optical conductivity in the t-J model with temperature and doping using the Extended Dynamical Cluster Approximation. The cluster approach results in an optical mass which is doping independent near half filling. The transition to the superconducting state in the overdoped regime is characterized by a decrease in the hole kinetic energy, in contrast to the underdoped side where kinetic energy of holes increases upon superfluid condensation. In both regimes, the optical conductivity displays anomalous transfers of spectral weight over a broad frequency region.

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