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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

Wednesday, 24 January 2007
(at 12:30 in room Phy 8.1.09)
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Spontaneous spin polarization in quantum point contacts

Andreas Helzel

Institut für Experimentelle und Angewandte Physik
Universität Regensburg

(From doi: 10.1103/PhysRevLett.96.156602): 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 2e2/h. Polarization is stronger in samples with a well defined ``0.7 structure''

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Invited by G. Cuniberti, C. Strunk (JClub)

Within the Journal Club 52 478

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