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VOLUME 57 (1993) | ISSUE 1 | PAGE 55
Hall insulator: experimental evidences
We have experimentally investigated a metal-insulator transition in two-dimensional electron systems of GaAs/AlGaAs heterojunctions in the extreme quantum limit. It has been observed that the Hall resistance Rxy of an insulating phase is close to the classical value Rxy Н/пяес while the magnetoresistance Rxx tends to infinity with decreasing temperature. Such behavior supports recent ideas of the Hall insulating state.