Hall Magnetocapacitance in Two-Dimensional Electron Systems
Abstract
The magnetocapacitance of a two-dimensional electron system (2DES) is investigated experimentally, both under the and away from quantum Hall conditions, at frequencies between 1 kHz and 100 MHz. The nature of the capacitive signal in a bounded 2DES is determined by a resistive cutoff frequency 1/τ~σxx, the longitudinal magnetoconductivity. A new response mechanism is reported for angular frequencies ω>1/τ, which is controlled by the transverse or Hall conductivity σxy and the boundaries of the sample. The mechanism is also found at frequencies far below those of the edge magnetoplasma resonances and away from the quantum Hall regime.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 1998
- DOI:
- 10.1103/PhysRevLett.81.5398
- arXiv:
- arXiv:cond-mat/9810377
- Bibcode:
- 1998PhRvL..81.5398V
- Keywords:
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- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- Experimental paper, 4 figures