Magnetotransport in manganites and the role of quantal phases: theory and experiment
While low-temperature Hall resisitivity rhoxy of La2/3(Ca,Pb)1/3MnO3 single crystals can be separated into ordinary (OHE) and anomalous (AHE) contributions, no such decomposition is possible near the Curie temperature Tc. Rather, the rhoxy data collapse to a single function of the reduced magnetizat...
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| Veröffentlicht in: | Physical review letters 2000-01, Vol.84 (4), p.757-760 |
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| creator | Chun, S H Salamon, M B Lyanda-Geller, Y Goldbart, P M Han, P D |
| description | While low-temperature Hall resisitivity rhoxy of La2/3(Ca,Pb)1/3MnO3 single crystals can be separated into ordinary (OHE) and anomalous (AHE) contributions, no such decomposition is possible near the Curie temperature Tc. Rather, the rhoxy data collapse to a single function of the reduced magnetization m=M/Msat, with an extremum at approximately 0.4 m. A new mechanism for the AHE in the inelastic hopping regime is identified that reproduces the scaling curve. An extension of Holstein's model for the hopping OHE, the mechanism arises from the combined effects of the double-exchange-induced quantal phase in triads of Mn ions and spin-orbit interactions. |
| doi_str_mv | 10.1103/physrevlett.84.757 |
| format | Article |
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Rather, the rhoxy data collapse to a single function of the reduced magnetization m=M/Msat, with an extremum at approximately 0.4 m. A new mechanism for the AHE in the inelastic hopping regime is identified that reproduces the scaling curve. 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| fulltext | fulltext |
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| ispartof | Physical review letters, 2000-01, Vol.84 (4), p.757-760 |
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| source | American Physical Society Journals |
| subjects | CALCIUM OXIDES CURIE POINT EXPERIMENTAL DATA HALL EFFECT L-S COUPLING LANTHANUM OXIDES LEAD OXIDES MAGNETIZATION MAGNETORESISTANCE MANGANESE OXIDES MATERIALS SCIENCE MONOCRYSTALS SCALING THEORETICAL DATA |
| title | Magnetotransport in manganites and the role of quantal phases: theory and experiment |
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