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arXiv · 0902.1633

Non-monotonic magnetoresistance of two-dimensional electron systems in the ballistic regime

A. Yu. Kuntsevich·G. M. Minkov·A. A. Sherstobitov·V. M. Pudalov
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Abstract

We report experimental observations of a novel magnetoresistance (MR) behavior of two-dimensional electron systems in perpendicular magnetic field in the ballistic regime, for k_BTτ/\hbar>1. The MR grows with field and exhibits a maximum at fields B>1/μ, where μis the electron mobility. As temperature increases the magnitude of the maximum grows and its position moves to higher fields. This effect is universal: it is observed in various Si- and GaAs- based two-dimensional electron systems. We compared our data with recent theory based on the Kohn anomaly modification in magnetic field, and found qualitative similarities and discrepancies.

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A. Yu. Kuntsevich, G. M. Minkov, A. A. Sherstobitov, V. M. Pudalov. 2009-02-10. Non-monotonic magnetoresistance of two-dimensional electron systems in the ballistic regime. https://doi.org/10.1103/physrevb.79.205319

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