Anomalous spin-dependent behaviour of one-dimensional subbands

Details Anomalous spin-dependent behaviour of one-dimensional subbands Anomalous spin-dependent behaviour of one-dimensional subbands

2007-02-07

arxiv.org/abs/cond-mat/0702177v1

PRB v.72, p.193305 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.72.193305

We report a new electron interaction effect in GaAs/AlGaAs quantum wires. Using DC-bias spectroscopy, we show that large and abrupt changes occur to the energies of spin-down (lower energy) states as they populate. The effect is not observed for spin-up energy states. At B=0, interactions have a pronounced effect, in the form of the well-known 0.7 Structure. However, our new results show that interactions strongly affect the energy spectrum at all magnetic fields, from 0 to 16T, not just in the vicinity of the 0.7 Structure.

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