%0 Journal Article
%T Double Exchange Alone Does Not Explain the Resistivity of $La_{1-x} Sr_x MnO_3$
%A A. J. Millis
%A P. B. Littlewood
%A B. I. Shraiman
%J Physics
%D 1995
%I arXiv
%R 10.1103/PhysRevLett.74.5144
%X The $La_{1-x} Sr_x MnO_3$ system with $0.2 \lesssim x \lesssim 0.4$ has traditionally been modelled with a ``double exchange'' Hamiltonian, in which it is assumed that the only relevant physics is the tendency of carrier hopping to line up neighboring spins. We present a solution of the double exchange model, show it is incompatible with many aspects of the resistivity data, and propose that a strong electron-phonon interaction arising from a Jahn-Teller splitting of the outer Mn d-level plays a crucial role.
%U http://arxiv.org/abs/cond-mat/9501034v1