Polaron transport and lattice dynamics in colossal-magnetoresistance manganites
Physical Review B - Condensed Matter and Materials Physics, ISSN: 1550-235X, Vol: 55, Issue: 18, Page: 12454-12459
1997
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Article Description
Based on the model combining the spin double exchange and the lattice polaron, we have studied the colossal-magnetoresistance phenomena observed in perovskite manganites (Formula presented)(Formula presented)(Formula presented). First, effects of both the double exchange and the electron-phonon interaction on the transport properties are investigated. We have evaluated the temperature-dependent resistance and the magnetoresistance using the Kubo formula, and examined the crossover from the tunneling to hopping regime of small polarons. Second, effects of the double-exchange interaction on the lattice degree of freedom are explored. It is found that both the hardening of the phonon frequency and a reduction of the phonon damping take place with decreasing the temperature. © 1997 The American Physical Society.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0000987253&origin=inward; http://dx.doi.org/10.1103/physrevb.55.12454; https://link.aps.org/doi/10.1103/PhysRevB.55.12454; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.55.12454/fulltext; http://link.aps.org/article/10.1103/PhysRevB.55.12454
American Physical Society (APS)
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