Hall Resistivity and Dephasing in the Quantum Hall Insulator

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The longstanding problem of the Hall resistivity rho(x,y) in the Hall insulator phase is addressed using four-lead Chalker-Coddington networks. Electron interaction effects are introduced via a finite dephasing length. In the quantum coherent regime, we find that rho(x,y) scales with the longitudinal resistivity rho(x,x), and they both diverge exponentially with dephasing length. In the Ohmic limit, (dephasing length shorter than Hall puddles' size), rho(x,y) remains quantized and independent of rho(x,x). This suggests a new experimental probe for dephasing processes.
RevTeX, 4 pages, 3 figures included with epsf.sty

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Mesoscale and Nanoscale Physics, Disordered Systems and Neural Networks

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http://salesiana.dossiersoluciones.com/handle/123456789/28501

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9808062
 http://arxiv.org/abs/cond-mat/9808062
 Phys. Rev. Lett. 82, 1253-6 (1999)
 doi:10.1103/PhysRevLett.82.1253

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