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A perfect spin-filter quantum dot system
KTH, Superseded Departments, Physics.
2004 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 16, no 16, L249-L254 p.Article in journal (Refereed) Published
Abstract [en]

The discovery of a novel effect in the transport through a QD spin-dependently coupled to magnetic contacts is reported. For a finite range of source-drain voltages the spin projections of the current cancel exactly, resulting in a completely suppressed output current. The spin down current behaves as one normally expects whereas the spin up current becomes negative. As the source-drain voltage is increased the spin up current eventually becomes positive. Thus, tuning the source-drain voltage such that the spin up current vanishes will result in a perfect spin filter.

Place, publisher, year, edition, pages
2004. Vol. 16, no 16, L249-L254 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-44976DOI: 10.1088/0953-8984/16/16/L03ISI: 000221482900004Scopus ID: 2-s2.0-2442446075OAI: oai:DiVA.org:kth-44976DiVA: diva2:453104
Available from: 2011-11-01 Created: 2011-10-26 Last updated: 2017-12-08Bibliographically approved

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