The theory of the "0.7 anomaly" in quantum point contacts

Abstract

The phenomenology of the "0.7 anomaly" in quantum point contacts is fully explained in terms of a quasi-localized state, which forms as the point contact opens up. Detailed numerical calculations within spin-density functional theory indeed con rm the emergence of such a state. Quantitative calculations of the conductance and the noise are obtained using a model based on these observations, and are in excellent agreement with existing experimental observations.

arXiv commentA summary paper, to be included in JPCM Special Issue on 0.7 Feature

References in corpus (7)

• Possible Spin Polarization in a One-Dimensional Electron Gas
• The Low-Temperature Fate of the 0.7 Structure in a Point Contact: A Kondo-like Correlated State in an Open System
• Kondo model for the "0.7 anomaly" in transport through a quantum point contact
• Magnetic impurity formation in quantum point contacts
• Local moment formation in quantum point contacts
• Shot-Noise Signatures of 0.7 Structure and Spin in a Quantum Point Contact
• Suppression of Shot Noise in Quantum Point Contacts in the "0.7" Regime

Cited by in corpus (8)

• What lurks below the last plateau: Experimental studies of the 0.7 x 2e^2/h conductance anomaly in one-dimensional systems
• Ferromagnetic Spin Coupling as the Origin of 0.7 Anomaly in Quantum Point Contacts
• Evidence for localization and 0.7 anomaly in hole quantum point contacts
• Origins of conductance anomalies in a p-type GaAs quantum point contact
• Functional Renormalization Group Approach for Inhomogeneous One-Dimensional Fermi Systems with Finite-Ranged Interactions
• Temperature Modulation of the Transmission Barrier in Quantum Point Contacts
• A Scaling Approach for Interacting Quantum Wires -a Possible Explanation for the 0.7 Anomalous Conductance
• Functional Renormalization Group treatment of the 0.7-analog in quantum point contacts