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

M. Kindermann·P. W. Brouwer·A. J. Millis
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Abstract

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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M. Kindermann, P. W. Brouwer, A. J. Millis. 2006-04-12. Interference as a Probe of Spin Incoherence in Strongly Interacting Quantum Wires. https://doi.org/10.1103/physrevlett.97.036809

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