Conductance fluctuations at the quantum Hall plateau transition

Article

关键词: RESISTANCE FLUCTUATIONS;    INELASTIC-SCATTERING;    MAGNETIC-FIELD;    REGIME;    LOCALIZATION;    TRANSPORT;    PHASE;   

DOI  :  10.1103/PhysRevB.66.073304

来源: SCIE

【 摘 要 】

We analyze the conductance fluctuations observed in the quantum Hall regime for a bulk two-dimensional electron system in a Corbino geometry. We find that characteristics like the power spectral density and the temperature dependence agree well with simple expectations for universal conductance fluctuations in metals, while the observed amplitude is reduced. In addition, the dephasing length L(Phi)proportional toT(-1/2), which governs the temperature dependence of the fluctuations, is surprisingly different from the scaling length L(sc)proportional toT(-1) governing the width of the quantum Hall plateau transition.

【 授权许可】

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