NONLINEAR CURRENT-VOLTAGE CHARACTERISTICS AT QUANTUM HALL RESISTANCE MINIMA

被引：37

作者：

BOISEN, A

BOGGILD, P

KRISTENSEN, A

LINDELOF, PE

机构：

[1] Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.50.1957

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The longitudinal resistivity rho(xx) at the quantum Hall midplateau of a low-mobility two-dimensional electron gas in a GaAs/AlxGa1-xAs heterostructure has been studied for different sample widths and different sample currents. The critical current for breakdown of the quantum Hall effect was found to be proportional to the width of the samples. A subcritical rise of rho(xx) with current density was found to be exponential, a relation which to the best of our knowledge has not previously been reported. The power dissipation thus increases exponentially with current, leading to a critical current determined by a thermal runaway.

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页码：1957 / 1960

页数：4

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