Spontaneous spin polarization in quantum point contacts

Preprint

5 April 2006

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0509448

Abstract

We use spatial spin separation by a magnetic focusing technique to probe the polarization of quantum point contacts. The point contacts are fabricated from p-type GaAs/AlGaAs heterostructures. A finite polarization is measured in the low-density regime, when the conductance of a point contact is tuned to <2e^2/h. Polarization is stronger in samples with a well defined ``0.7 structure''

Keywords

POLARIZATION IN QUANTUM
QUANTUM POINT CONTACTS
SPIN POLARIZATION
SPONTANEOUS SPIN
SPIN SEPARATION
SPATIAL SPIN
USE SPATIAL

All Related Versions

Version 1, 2005-09-16, ArXiv
Version 2, 2006-04-05, ArXiv
Published version: Physical Review Letters, 96 (15), 156602.

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