Classical versus quantum transport near quantum Hall transitions

Efrat Shimshoni
Phys. Rev. B 60, 10691 – Published 15 October 1999
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Abstract

Transport data near quantum Hall transitions are interpreted by identifying two distinct conduction regimes. The “classical” regime, dominated by nearest-neighbor hopping between localized conducting puddles, manifests an activatedlike resistivity formula, and the quantized Hall insulator behavior. At very low temperatures T, or farther from the critical point, a crossover occurs to a “quantum” transport regime dominated by variable range hopping. The latter is characterized by a different T dependence, yet the dependence on filling fraction is coincidentally hard to distinguish.

  • Received 19 April 1999

DOI:https://doi.org/10.1103/PhysRevB.60.10691

©1999 American Physical Society

Authors & Affiliations

Efrat Shimshoni

  • Department of Mathematics-Physics, Oranim–Haifa University, Tivon 36006, Israel

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Vol. 60, Iss. 15 — 15 October 1999

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