Exciton Transport and Andreev Reflection in a Bilayer Quantum Hall System

Details Exciton Transport and Andreev Reflection in a Bilayer Quantum Hall System Exciton Transport and Andreev Reflection in a Bilayer Quantum Hall System

2010-12-19

arxiv.org/abs/1012.4220v2

Phys. Rev. Lett. 106, 236807 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 4 figures. Revised version as accepted for publication in Physical Review Letters

Scientific paper

We demonstrate that counterflowing electrical currents can move through the bulk of the excitonic quantized Hall phase found in bilayer two-dimensional electron systems (2DES) even as charged excitations cannot. These counterflowing currents are transported by neutral excitons which are emitted and absorbed at the inner and outer boundaries of an annular 2DES sample via an Andreev reflection process.

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