A dc voltage step-up transformer based on a bi-layer ν=1 quantum Hall system

Details A dc voltage step-up transformer based on a bi-layer ν=1 quantum Hall system A dc voltage step-up transformer based on a bi-layer ν=1 quantum Hall system

2003-01-23

arxiv.org/abs/cond-mat/0301442v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.67.235313

A bilayer electron system in a strong magnetic field at low temperatures, with total Landau level filling factor nu =1, can enter a strongly coupled phase, known as the (111) phase or the quantum Hall pseudospin-ferromagnet. In this phase there is a large quantized Hall drag resistivity between the layers. We consider here structures where regions of (111) phase are separated by regions in which one of the layers is depleted by means of a gate, and various of the regions are connected together by wired contacts. We note that with suitable designs, one can create a DC step-up transformer where the output voltage is larger than the input, and we show how to analyze the current flows and voltages in such devices.

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