Prediction of the quantization of magnetic flux in double layer exciton superfluids

Details Prediction of the quantization of magnetic flux in double layer exciton superfluids Prediction of the quantization of magnetic flux in double layer exciton superfluids

2010-09-09

arxiv.org/abs/1009.1793v1

Phys.Rev.B83:012504,2011

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.83.012504

Currently a way is lacking to detect unambiguously the possible phase coherence of an exciton condensate in an electron-hole double layer. Here we show that despite the fact that excitons are charge-neutral, the double layer exciton superfluid exhibits a diamagnetic response. In devices with specific circular geometry the magnetic flux threading between the layers must be quantized in units of $\frac{h}{e} \chi_m$ where $\chi_m$ is the diamagnetic susceptibility of the device. We discuss possible experimental realizations of the predicted unconventional flux quantization.

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