On the Zero-Bias Anomaly in Quantum Wires

S. Sarkozy; F. Sfigakis; K. Das Gupta; I. Farrer; D. A. Ritchie; G. A. C. Jones; M. Pepper

doi:10.1103/physrevb.79.161307

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arXiv · 0810.0960

On the Zero-Bias Anomaly in Quantum Wires

S. Sarkozy·F. Sfigakis·K. Das Gupta·I. Farrer·D. A. Ritchie·G. A. C. Jones·M. Pepper

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Abstract

Undoped GaAs/AlGaAs heterostructures have been used to fabricate quantum wires in which the average impurity separation is greater than the device size. We compare the behavior of the Zero-Bias Anomaly against predictions from Kondo and spin polarization models. Both theories display shortcomings, the most dramatic of which are the linear electron-density dependence of the Zero-Bias Anomaly spin-splitting at fixed magnetic field B and the suppression of the Zeeman effect at pinch-off.

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S. Sarkozy, F. Sfigakis, K. Das Gupta, I. Farrer, D. A. Ritchie, G. A. C. Jones, M. Pepper. 2008-10-06. On the Zero-Bias Anomaly in Quantum Wires. https://doi.org/10.1103/physrevb.79.161307

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