Composite Spin Waves, Quasi-Particles and Low Temperature resistivity in Double Exchange Systems
arXiv:cond-mat/0010312 · doi:10.1103/PhysRevB.64.140403
Abstract
We make a quantum description of the electron low temperature properties of double exchange materials. In these systems there is a strong coupling between the core spin and the carriers spin. This large coupling makes the low energy spin waves to be a combination of ion and electron density spin waves. We study the form and dispersion of these composite spin wave excitations. We also analyze the spin up and down spectral functions of the temperature dependent quasi-particles of this system. Finally we obtain that the thermally activated composite spin waves renormalize the carriers effective mass and this gives rise to a low temperature resistivity scaling as T ^{5/2}.
4 pages, REVTEX
References in corpus (7)
- Theory of Diluted Magnetic Semiconductor Ferromagnetism
- Electrical transport in the ferromagnetic state of manganites: Small-polaron metallic conduction at low temperatures
- Unconventional one-magnon scattering resistivity in half metals
- Monte Carlo Simulations for the Magnetic Phase Diagram of the Double Exchange Hamiltonian
- Spin Wave Theory of Double Exchange Ferromagnets
- Low temperature resistivity in a nearly half-metallic ferromagnet
- Conductance as a Function of the Temperature in the Double Exchange Model