Spin polarons and variable range hopping in magnetically disordered systems
- 16 August 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 71 (7) , 1067-1070
- https://doi.org/10.1103/physrevlett.71.1067
Abstract
Magnetic polarons in magnetically disordered systems (for brevity, spin-glass polarons) are in one respect very unlike other polarons: Usual polaron hopping at low T proceeds via tunneling, and these polarons do not affect the T dependence of the hopping rate, while the spin-glass polaron tunneling is suppressed by the disorder, and their hopping proceeds via activation for all T. It gives rise to the reentrance of the simple activated T dependence of variable range hopping conductivity at very low T. Recent experiments in CdMnTe are discussed.Keywords
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