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Odd-even spin effects and variation of g factor in a quasi-one-dimensional subband

Chen, TM; Graham, AC; Pepper, M; Sfigakis, F; Farrer, I; Ritchie, DA; (2009) Odd-even spin effects and variation of g factor in a quasi-one-dimensional subband. PHYS REV B , 79 (8) , Article 081301. 10.1103/PhysRevB.79.081301.

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Abstract

Four odd-even spin phenomena are observed in electronic transport through a quantum wire. They consistently imply that a quasi-one-dimensional system tends to a spontaneous spin polarization with the energy band of minority spin-up electrons being reluctant to populate, thus widening the spin gap in energy. Variation of g factor within a single subband is measured using a dc conductance technique, showing clear evidence of an oscillatory g value as 1D subbands are filled one by one with increasing carrier density.

Type:Article
Title:Odd-even spin effects and variation of g factor in a quasi-one-dimensional subband
DOI:10.1103/PhysRevB.79.081301
Keywords:aluminium compounds, carrier density, electric admittance, electron spin polarisation, energy gap, gallium arsenide, g-factor, III-V semiconductors, semiconductor heterojunctions, semiconductor quantum wires, SADDLE-POINT CONSTRICTION, ELECTRON-GAS, CONDUCTANCE, CHANNELS
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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