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

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.

reference added, typos corrected

References in corpus (4)

• Green's function for magnetically incoherent interacting electrons in one dimension
• Theory of momentum resolved tunneling into a short quantum wire
• Transport in a spin incoherent Luttinger liquid
• Short-range correlations and spin-mode velocities in ultrathin one-dimensional conductors

Cited by in corpus (10)

• Detection of spin polarized currents in quantum point contacts via transverse electron focusing
• Sagnac interference in Carbon nanotube loops
• Boundary Green's Function for Spin-Incoherent Interacting Electrons in One Dimension
• Fermi-edge singularity in a spin-incoherent Luttinger liquid
• Tunneling Density of States, Pair Correlation, and Josephson Current in Spin-Incoherent Luttinger Liquid-Superconductor Hybrid Systems
• Multiple crossovers in interacting quantum wires
• Dephasing in a quantum dot coupled to a quantum point contact
• Non-equilibrium charge noise and dephasing from a spin-incoherent Luttinger liquid
• Junctions of Spin-Incoherent Luttinger Liquids with Ferromagnets and Superconductors
• Hall effect between parallel quantum wires