Das Gupta, K;
Zero-bias anomaly in quantum wires.
PHYS REV B
, Article 161307. 10.1103/PhysRevB.79.161307.
We use quantum wires fabricated on undoped GaAs/AlGaAs heterostructures in which the average impurity separation is greater than the device size to 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 is 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.
|Title:||Zero-bias anomaly in quantum wires|
|Keywords:||gallium arsenide, Kondo effect, semiconductor heterojunctions, semiconductor quantum wires, spin polarised transport, Zeeman effect, SADDLE-POINT CONSTRICTION, DIMENSIONAL ELECTRON-GAS, CONDUCTANCE, CONTACTS, TRANSPORT, LIMIT, DOTS|
|UCL classification:||UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering|
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