Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-10-29
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
8 pages, 8 figures. Accepted for publication in Review of Scientific Instruments
Scientific paper
10.1063/1.3030860
We have embedded an AlGaAs/GaAs based, gated 2D hole system (2DHS) into an impedance transformer $LC$ circuit, and show that by using radio-frequency reflectometry it is possible to perform sensitive, large bandwidth, electrical resistance measurements of 2D systems at mK temperatures. We construct a simple lumped element model where the gated 2DHS is described as a resistive transmission line. The model gives a qualitative understanding of the experimental results. As an example, we use our method to map out the Landau level evolution in a 2DHS as a function of magnetic field and gate voltage.
Hamilton Alex R.
Martin Theodore P.
Micolich Adam P.
Pepper Michael
Ritchie Dave A.
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