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arXiv · cond-mat/9810377

Hall magnetocapacitance in two-dimensional electron systems

A. M. C. Valkering·P. K. H. Sommerfeld·R. A. M. van de Ven·R. W. van der Heijden·F. A. P. Blom·M. J. Lea·F. M. Peeters
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Abstract

The magnetocapacitance of a two-dimensional electron system (2DES) is investigated experimentally, both under and away from Quantum Hall (QH) conditions, at frequencies between 1 kHz and 100 MHz. The nature of the capacitive signal in a bounded 2DES is determined by a resistive cut-off frequency 1/$τ\propto σ_{xx}$, the longitudinal magnetoconductivity. A new response mechanism is reported for angular frequencies $ω> 1/τ$, which is controlled by the $\em transverse$ or Hall conductivity $σ_{xy}$ and the boundaries of the sample, even at frequencies far below those of the Edge Magnetoplasma resonances and away from the QH-conditions.

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A. M. C. Valkering, P. K. H. Sommerfeld, R. A. M. van de Ven, R. W. van der Heijden, F. A. P. Blom, M. J. Lea, F. M. Peeters. 1998-10-28. Hall magnetocapacitance in two-dimensional electron systems. https://doi.org/10.1103/physrevlett.81.5398

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