On the magnetoresistance anisotropy of a 2-dimensional electron gas with large half-integer filling factors

Herbert Kroemer

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On the magnetoresistance anisotropy of a 2-dimensional electron gas with large half-integer filling factors

Herbert Kroemer

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Abstract

The unsymmetric confinement of the electrons in a typical 2-dimensional electron gas (2DEG) breaks the full cubic symmetry of the in-plane transport properties. A rigorous invariance of the transport under rotation by pi/2 about the cubic axis perpendicular to the plane of the gas no longer holds, even for structurally perfect samples, and asymmetries under rotation by pi/2 are allowed. It is proposed that this symmetry breaking plays a role in the recent observation, by Little et al., of the pronounced anisotropy of the magnetoresistance of a 2DEG at very low temperatures, at large half-integer filling factors of the Landau levels in such a system.

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Herbert Kroemer. 1999-01-04. On the magnetoresistance anisotropy of a 2-dimensional electron gas with large half-integer filling factors. https://arxiv.org/abs/cond-mat/9901016

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