期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 20, 期 16, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/20/16/164212
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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'.
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