Coulomb drag as a probe of the nature of compressible States in a magnetic field.
Coulomb drag as a probe of the nature of compressible States in a magnetic field.
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库仑阻力作为磁场中可压缩态性质的探针
DOI：
10.1103/physrevlett.92.246801
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发表时间：
2004
影响因子：
8.6
通讯作者：
W. Wegscheider
中科院分区：
文献类型：
--
作者：
K. Muraki;J.G. S. Lok;S. Kraus;W. Dietsche;K. von Klitzing;D. Schuh;M. Bichler;W. Wegscheider
磁阻力揭示了可压缩状态的本质以及无序和相互作用的潜在相互作用。观察到明显的依赖性，这表明朗道能级的金属性质。相反，在较高的朗道能级上，阻力显示出一个额外的贡献，该贡献在遵循热激活定律变为零之前随着减小而急剧增大。讨论了由无序和局域化引起的电子-空穴不对称性以及由于无序屏蔽而引起的高场下向正常拖曳的交叉。
Magnetodrag reveals the nature of compressible states and the underlying interplay of disorder and interactions. Atcleardependence is observed, which signifies the metallic nature of theLandau level. In contrast, drag in higher Landau levels reveals an additional contribution, which anomalously grows with decreasingbefore turning to zero following a thermal activation law. The anomalous drag is discussed in terms of electron-hole asymmetry arising from disorder and localization, and the crossover to normal drag at high fields as due to screening of disorder.