Spontaneous Spin Polarization in Quantum Wires

Details Spontaneous Spin Polarization in Quantum Wires Spontaneous Spin Polarization in Quantum Wires

2005-07-16

arxiv.org/abs/cond-mat/0507387v1

Europhys. Lett. 74, 679 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1209/epl/i2006-10024-x

A number of recent experiments report spin polarization in quantum wires in the absence of magnetic fields. These observations are in apparent contradiction with the Lieb-Mattis theorem, which forbids spontaneous spin polarization in one dimension. We show that sufficiently strong interactions between electrons induce deviations from the strictly one-dimensional geometry and indeed give rise to a ferromagnetic ground state in a certain range of electron densities.

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