Spin-Incoherent Transport in Quantum Wires

Abstract

When a quantum wire is weakly confined, a conductance plateau appears at e^2/h with decreasing carrier density in zero magnetic field accompanied by a gradual suppression of the 2e^2/h plateau. Applying an in-plane magnetic field B|| does not alter the value of this quantization; however, the e^2/h plateau weakens with increasing B|| up to 9 T, and then strengthens on further increasing B||, which also restores the 2e^2/h plateau. Our results are consistent with spin-incoherent transport in a one-dimensional wire.

4 pages, 6 figures

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• Spin Properties of Low Density One-Dimensional Wires
• Non-Unitary Spin-Charge Separation in One-Dimensional Fermion Gas
• Green's function for magnetically incoherent interacting electrons in one dimension
• Transition from a one-dimensional to a quasi-one-dimensional state in interacting quantum wires
• Asymmetric Zero-Bias Anomaly for Strongly Interacting Electrons in One Dimension

Cited by in corpus (26)

• All-Electric Quantum Point Contact Spin Valve
• Wigner crystal physics in quantum wires
• What lurks below the last plateau: Experimental studies of the 0.7 x 2e^2/h conductance anomaly in one-dimensional systems
• Incipient Formation of an Electron Lattice in a Weakly-Confined Quantum Wire
• Wigner and Kondo physics in quantum point contacts revealed by scanning gate microscopy
• Spectral properties of a spin-incoherent Luttinger Liquid
• Row coupling in an interacting quasi-one-dimensional quantum wire investigated using transport measurements
• Valley subband splitting in bilayer graphene quantum point contact
• Possible origin of the 0.5 plateau in the ballistic conductance of quantum point contacts
• Imaging the zigzag Wigner crystal in confinement-tunable quantum wires
• Spectral function of few electrons in quantum wires and carbon nanotubes as a signature of Wigner localization
• Self-Organised Fractional Quantisation in a Hole Quantum Wire
• Extreme sensitivity of the spin-splitting and 0.7 anomaly to confining potential in one-dimensional nanoelectronic devices
• Spin-incoherent behavior in the ground state of strongly correlated systems
• Nonequilibrium kinetics of a disordered Luttinger liquid
• Quantum interference and spin-charge separation in a disordered Luttinger liquid
• Quantized critical supercurrent in SrTiO${}_3$-based quantum point contacts
• Magnetic Field Inducing Zeeman Splitting and Anomalous Conductance Reduction of Half-integer Quantized Plateaus in InAs Quantum Wires
• Spin-charge separation in an Aharonov-Bohm interferometer
• Fractional exclusion statistics and thermodynamics of the Hubbard chain in the spin-incoherent Luttinger liquid regime
• Conductance quantization and shot noise of a double-layer quantum point contact
• Quasibound States and Evidence for a Spin 1 Kondo Effect in Asymmetric Quantum Point Contacts
• Singular responses of spin-incoherent Luttinger liquids
• Junctions of Spin-Incoherent Luttinger Liquids with Ferromagnets and Superconductors
• Novel Differential Conductance Oscillations in Asymmetric Quantum Point Contacts
• Influence of Impurity Scattering on the Conductance Anomalies of Quantum Point Contacts with Lateral Spin-Orbit Coupling