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Angular conductance resonances of quantum dots non-collinearly coupled to ferromagnetic leads
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2005 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 70, no 6, 796-802 p.Article in journal (Refereed) Published
Abstract [en]

The zero-bias conductance of quantum dots coupled to ferromagnetic leads is investigated. In the strong-coupling regime, it is found that the conductance is a non-monotonic function of the angle between the magnetisation directions in the two contacts. This behaviour is an effect of the presence of the leads which induces an angle-dependent spin-split of the quantum dot states, and spin-flip transitions between the quantum dot states whenever the magnetisation directions of the leads are non-collinear, which enhances the current density at the chemical potential. In the weak-coupling regime, the system reverts to normal spin valve character.

Place, publisher, year, edition, pages
2005. Vol. 70, no 6, 796-802 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-47267DOI: 10.1209/epl/i2005-10043-1ISI: 000230210600014Scopus ID: 2-s2.0-20844441663OAI: oai:DiVA.org:kth-47267DiVA: diva2:456254
Note
QC 20111114Available from: 2011-11-14 Created: 2011-11-07 Last updated: 2017-12-08Bibliographically approved

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