Fluctuation Controlled Hopping of Bound Magnetic Polarons in ErAs:GaAs Nanocomposites
- 25 January 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 82 (4) , 823-826
- https://doi.org/10.1103/physrevlett.82.823
Abstract
Transport in ErAs:GaAs nanocomposites occurs via hopping of bound magnetic polarons between nanoparticles of magnetic semimetallic ErAs. A strong negative magnetoresistance, up to 3 orders of magnitude and strongly dependent upon ErAs particle size, is accompanied by a low field positive magnetoresistance. A model that features fluctuation controlled hopping captures this behavior.Keywords
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