Showing papers on "Magnetocapacitance published in 1996"
4 citations
TL;DR: In this paper, the authors investigated the AC conductivity elements in the quantum Hall regime of two-dimensional electron gases coupled capacitively to electrodes with Corbino geometry and found that the diagonal conductivity is derived from magnetocapacitance measurements, and that the exponent of the power law depends on both temperature and filling factor.
Abstract: We have investigated the AC conductivity elements in the quantum Hall regime of two‐dimensional electron gases coupled capacitively to electrodes with Corbino geometry. The samples are GaAlAs/GaAs single heterostructures, and the measurements are made at low frequencies, up to 20 kHz. The diagonal conductivity is derived from magnetocapacitance measurements. It increases with increasing frequency according to a power law at integer filling factors. The exponent of the power law depends on both temperature and filling factor. Ratios between Hall conductivities at different filling factors are obtained by inductive measurements of the circulating current. They are found to agree with quantization in multipla of e2/h at the integer filling factors.
2 citations
TL;DR: In this article, the bulk conductivity of two-dimensional electron gas in GaAs/AlGaAs heterostructure in the quantum Hall regime was investigated by the magnetocapacitance measurement with Corbino geometry sample.
Abstract: We have investigated the bulk conductivity (σxx) of two-dimensional electron gas in GaAs/AlGaAs heterostructure in the quantum Hall regime by the magnetocapacitance measurement with Corbino geometry sample. The σxx at the Hall plateau down to 10−11 S is measured, and the temperature dependence of σxx is discussed. The experimental characteristics of the capacitance measurement is also discussed.
2 citations