Abstract
The system with has traditionally been modeled 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 data, and propose that in addition to double-exchange physics a strong electron-phonon interaction arising from the Jahn-Teller splitting of the outer Mn level plays a crucial role.
- Received 12 January 1995
DOI:https://doi.org/10.1103/PhysRevLett.74.5144
©1995 American Physical Society