Density dependent spin polarisation in ultra low-disorder quantum wires
Preprint
- 19 February 2002
Abstract
There is controversy as to whether a one-dimensional (1D) electron gas can spin polarise in the absence of a magnetic field. Together with a simple model, we present conductance measurements on ultra low-disorder quantum wires supportive of a spin polarisation at B=0. A spin energy gap is indicated by the presence of a feature in the range 0.5 - 0.7 X 2e^2/h in conductance data. Importantly, it appears that the spin gap is not static but a function of the electron density. Data obtained using a bias spectroscopy technique are consistent with the spin gap widening further as the Fermi-level is increased.Keywords
All Related Versions
- Version 1, 2002-02-19, ArXiv
- Published version: Physical Review Letters, 89 (24), 246801.
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