Spin Properties of Low Density One-Dimensional Wires
arXiv:cond-mat/0005075 · doi:10.1103/PhysRevB.61.R13365
Abstract
We report conductance measurements of a ballistic one-dimensional (1D) wire defined in the lower two-dimensional electron gas of a GaAs/AlGaAs double quantum well. At low temperatures there is an additional structure at in the conductance, which tends to as the electron density is decreased. We find evidence for complete spin polarization in a weakly disorderd 1D wire at zero magnetic field through the observation of a conductance plateau at , which strengthens in an in-plane magnetic field and disappears with increasing electron density. In all cases studied, with increasing temperature structure occurs at . We suggest that the 0.7 structure is a many-body spin state excited out of, either the spin-polarized electron gas at low densities, or the spin-degenerate electron gas at high densities.
5 pages, 4 fugures, to appear in Phys. Rev. B (Rapid) 15 May 2000 issue
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Cited by in corpus (53)
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