Theory of Colossal Magnetoresistance in {ital R}{sub 1{minus}{ital x}}{ital A}{sub {ital x}}MnO{sub 3}
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, Texas 77204 (United States)
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)
A localization model comprising spin disorder and nonmagnetic randomness is presented to account for novel magnetotransport properties in Mn oxides R{sub 1{minus}x}A{sub x}MnO{sub 3}. Localization length of electrons as a function of magnetization is determined by means of the transfer matrix method. Including the Coulomb interaction between electrons, the variable-range hopping resistivity is calculated as a function of temperature and magnetic field. The resulting sharp resistivity peak near the Curie temperature and, in particular, the magnitude of the colossal negative magnetoresistance are in good agreement with experimental measurements. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 560645
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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