Nonlocal edge state transport in the quantum spin Hall state

Details Nonlocal edge state transport in the quantum spin Hall state Nonlocal edge state transport in the quantum spin Hall state

2009-05-04

arxiv.org/abs/0905.0365v1

Science 325, 294 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 4 figures

Scientific paper

10.1126/science.1174736

We present direct experimental evidence for nonlocal transport in HgTe quantum wells in the quantum spin Hall regime, in the absence of any external magnetic field. The data conclusively show that the non-dissipative quantum transport occurs through edge channels, while the contacts lead to equilibration between the counter-propagating spin states at the edge. We show that the experimental data agree quantitatively with the theory of the quantum spin Hall effect.

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