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Unusual insulating phase at low temperature in thin indium films

Identifieur interne : 01B963 ( Main/Repository ); précédent : 01B962; suivant : 01B964

Unusual insulating phase at low temperature in thin indium films

Auteurs : RBID : Pascal:95-0291402

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English descriptors

Abstract

We have prepared a series of thin indium films whose disorder is systematically introduced, and measured the temperature-dependent and magnetic-field-dependent Hall resistance Rxy as well as the longitudinal resistance Rxx at low temperatures. By increasing the field at fixed disorder, we have found, in addition to a usual critical field BxxC where Rxx(T→0)→∞, another critical field BxyC (>BxxC) where Rxy(T→0) diverges. With increasing disorder, BxxC decreases faster than BxyC, thus the region BxxCxyC as the critical disorder is approached. We suggest a possibility that the region BxxCxyC corresponds to the Bose-insulator phase.

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Pascal:95-0291402

Le document en format XML

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<div type="abstract" xml:lang="en">We have prepared a series of thin indium films whose disorder is systematically introduced, and measured the temperature-dependent and magnetic-field-dependent Hall resistance R
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at low temperatures. By increasing the field at fixed disorder, we have found, in addition to a usual critical field B
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where R
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(T→0)→∞, another critical field B
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