Interference as a Probe of Spin Incoherence in Strongly Interacting Quantum Wires

Details Interference as a Probe of Spin Incoherence in Strongly Interacting Quantum Wires Interference as a Probe of Spin Incoherence in Strongly Interacting Quantum Wires

2006-03-23

arxiv.org/abs/cond-mat/0603604v2

Phys. Rev. Lett. 97, 036809 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

reference added, typos corrected

Scientific paper

10.1103/PhysRevLett.97.036809

We show that interference experiments can be used to identify the spin-incoherent regime of strongly interacting one-dimensional conductors. Two qualitative signatures of spin-incoherence are found: a strong magnetic field dependence of the interference contrast and an anomalous scaling of the interference contrast with the applied voltage, with a temperature and magnetic field dependent scaling exponent. The experiments distinguish the spin-incoherent from the spin-polarized regime, and so may be useful in deciding between alternative explanations proposed for the anomalous conductance quantization observed in quantum point contacts and quantum wires at low density.

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