We report magnetotransport of (Ga, Mn)As below 1 K in the reentrant insulating phase. The external magnetic field drove the samples from the strongly insulating regime to the variable range hopping one. Below 1 K, the resistivity was strongly anisotropic (by about two orders of magnitude). The conduction along the highly resistive direction () was well described by variable range hopping in the soft Coulomb gap regime while that along the lower resistive direction () seemed to undergo an insulator-to-metal transition by the external magnetic field. The result may be a key to solve the problem of reentrant metal-to-insulator transition in (Ga, Mn)As with increasing Mn content.
|ジャーナル||Physica Status Solidi (B) Basic Research|
|出版ステータス||Published - 1998 1|
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