The Low-Temperature Fate of the 0.7 Structure in a Point Contact: A Kondo-like Correlated State in an Open System

Abstract

Besides the usual conductance plateaus at multiples of 2e2/h, quantum point contacts typically show an extra plateau at ~ 0.7(2e2/h), believed to arise from electron-electron interactions that prohibit the two spin channels from being simultaneously occupied. We present evidence that the disappearance of the 0.7 structure at very low temperature signals the formation of a Kondo-like correlated spin state. Evidence includes a zero-bias conductance peak that splits in a parallel field, scaling of conductance to a modified Kondo form, and consistency between peak width and the Kondo temperature.

References in corpus (16)

• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• Low Temperature Transport through a Quantum Dot: The Anderson Model out of Equilibrium
• From the Kondo Regime to the Mixed-Valence Regime in a Single-Electron Transistor
• The Kondo Effect in the Unitary Limit
• Possible Spin Polarization in a One-Dimensional Electron Gas
• Kondo physics in carbon nanotubes
• Transport Coefficients of the Anderson Model via the Numerical Renormalization Group
• Interaction Effects in a One-Dimensional Constriction
• Anomalous Kondo-effect in Quantum Dot at non-zero bias
• Bias and temperature dependence of the 0.7 conductance anomaly in Quantum Point Contacts
• Many-body spin related phenomena in ultra-low-disorder quantum wires
• Ferromagnetic correlations in quasi-one-dimensional conducting channels
• Temperature dependence of the ``0.7'' 2(e^2)/h quasi plateau in strongly confined quantum point contacts
• Coulomb Blockade Resonances in Quantum Wires
• Temperature Dependent Suppression of Conductance in Quantum Wires: Anomalous Activation Energy from Pinning of the Band Edge

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• Extreme sensitivity of the spin-splitting and 0.7 anomaly to confining potential in one-dimensional nanoelectronic devices
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