Transport properties in the boson-fermion model for high-T-c superconductors

We investigate the anomalous temperature and doping dependence of the Hall coefficient in high-ir, cuprate superconductors. The study is performed wit hin the framework of the boson-fermion model, which describes a mixture of quasi-free electrons and tightly bound electron pairs, hybridized with each other via a charge-exchange mechanism. The model is analyzed in the limit of infinite dimensions using the non-crossing approximation within the dyna mical mean-field theory. (C) 2000 Elsevier Science B.V. All rights reserved .