Spin incoherent transport in density-modulated quantum wires

Details Spin incoherent transport in density-modulated quantum wires Spin incoherent transport in density-modulated quantum wires

2009-03-29

arxiv.org/abs/0903.5076v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 figures

Scientific paper

Density, temperature and magnetic field dependences on electron transport in a quantum wire were studied. Decrease of carrier density gives a negative conductance correction on the first plateau at low temperatures. The prominent and mysterious "0.7 structure" is more clearly resolved at low densities. The thermal behavior of the conductance follows the predictions of the spin-incoherent transport. The 0.7 structure at a low density drops to $e^2/h$ in a smaller in-plane magnetic field. The features are qualitatively consistent with the theoretical predictions and provide evidence for the existence of Wigner Crystal in low density quantum wires.

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