期刊
PHYSICAL REVIEW LETTERS
卷 96, 期 15, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.96.156602
关键词
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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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