Europhys. Lett, 33 (6), pp. 471-476 (1996)
Physics Department, Ben Gurion University - Beer Sheva 84105, Israel
(received 11 September 1995; accepted in final form 3 January 1996)
PACS. 72.20My - Galvanomagnetic and other magnetotransport effects.
PACS. 72.20-i - Conductivity phenomena in semiconductors and insulators.
PACS. 73.50Jt - Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects).
The magnetoresistance in the variable-range hopping regime due to Zeeman spin-splitting and intra-impurity interactions is calculated analytically and shown to be a universal function of . Good agreement with numerical calculations in one and two dimensions is observed. With the inclusion of quantum interference effects, excellent agreement with recent experiments is obtained.
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