Hall resistance in the hopping regime, a "Hall Insulator"?

Details Hall resistance in the hopping regime, a "Hall Insulator"? Hall resistance in the hopping regime, a "Hall Insulator"?

1995-04-03

arxiv.org/abs/cond-mat/9504005v1

Physics

Condensed Matter

Latex

Scientific paper

10.1103/PhysRevLett.75.4094

The Hall conductivity and resistivity of strongly localized electrons at low temperatures and at small magnetic fields are obtained. It is found that the results depend on whether the conductivity or the resistivity tensors are averaged to obtain the macroscopic Hall resistivity. In the second case the Hall resistivity always {\it diverges} exponentially as the temperature tends to zero. But when the Hall resistivity is derived from the averaged conductivity, the resulting temperature dependence is sensitive to the disorder configuration. Then the Hall resistivity may approach a constant value as $T\to 0$. This is the Hall insulating behavior. It is argued that for strictly dc conditions, the transport quantity that should be averaged is the resistivity.

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