Optical properties of the Holstein-t-J model from dynamical mean-field theory

E. Cappelluti , S. Ciuchi (1) , Simone Fratini (2)

1 Dipartimento di Fisica [L'Aquila]
2 NEEL - TMC - Théorie de la Matière Condensée

We employ dynamical mean-field theory to study the optical conductivity $\sigma(\omega)$ of one hole in the Holstein-t-J model. We provide an exact solution for $\sigma(\omega)$ in the limit of infinite connectivity. We apply our analysis to Nd$_{2-x}$Ce$_x$CuO$_4$. We show that our model can explain many features of the optical conductivity in this compounds in terms of magnetic/lattice polaron formation.

Domaines: Autre [cond-mat.other]

E. Cappelluti, S. Ciuchi, Simone Fratini. Optical properties of the Holstein-t-J model from dynamical mean-field theory. Physica B: Condensed Matter, 2007, 403, pp.1181. ⟨10.1016/j.physb.2007.10.107⟩. ⟨hal-00704957⟩