Magnon scattering processes and low temperature resistivity in CMR manganites
Abstract
Low temperature resistivity of CMR manganites is investigated. At the ground state, conduction electrons are perfectly spin polarized, which is called half-metallic. From one-magnon scattering processes, it is discussed that the resistivity of a half metal as a function of temperature scales as rho(T) - rho(0) propto T3. We take (Nd,Tb,Sr)MnO3 as an example to compare theory and experiments. The result is in a good agreement.
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