Fermi-liquid-to-polaron crossover. II. Double exchange and the physics of colossal magnetoresistance

A. J. Millis, R. Mueller, Boris I. Shraiman
1996 Physical Review B (Condensed Matter)  
We use the dynamical mean field method to study a model of electrons Jahn-Teller coupled to localized classical oscillators and ferromagnetically coupled to "core spins", which, we argue, contains the essential physics of the "colossal magnetoresistance" manganites Re_1-x A_x MnO_3. We determine the different regimes of the model and present results for the temperature and frequency dependence of the conductivity, the electron spectral function and the root mean square lattice parameter
more » ... ions. We compare our results to data, and give a qualitative discussion of important physics not included in the calculation. Extensive use is made of results from a companion paper titled: "On the Fermi Liquid to Polaron Crossover I: General Results".
doi:10.1103/physrevb.54.5405 pmid:9986499 fatcat:kzpbkfpjrzf7zo2o7hgqbuccza