Title variants
Languages of publication
Abstracts
The spin-polarized transport through two-level quantum dots weakly coupled to ferromagnetic leads is considered theoretically in the Coulomb blockade regime. It is assumed that the dot is doubly occupied, so that the current flows due to cotunneling through singlet and triplet states of the dot. It is shown that, by sweeping the bias voltage, one can induce a singlet-triplet transition, which depends on the magnetic configuration of the system and leads to nontrivial bias dependence of both the differential conductance and tunnel magnetoresistance.
Discipline
Journal
Year
Volume
Issue
Pages
529-532
Physical description
Dates
published
2008-01
received
2007-07-09
Contributors
author
- Department of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
References
- 1. S. Maekawa, T. Shinjo, Spin Dependent Transport in Magnetic Nanostructures, Taylor Francis, London 2002
- 2. W. Rudziński, J. Barnaś, Phys. Rev. B 64, 085318 (2001);M. Braun, J. König, J. Martinek, Phys. Rev. B 70, 195345 (2004)
- 3. I. Weymann, J. König, J. Martinek, J. Barnaś, G. Schön, Phys. Rev. B 72, 115334 (2005); I. Weymann, Europhys. Lett. 76, 1200 (2006); I. Weymann, J. Barnaś, Phys. Rev. B 75, 155308 (2007)
- 4. W. Izumida, O. Sakai, S. Tarucha, Phys. Rev. Lett. 87, 216803 (2001)
- 5. M. Julliere, Phys. Lett. A 54, 225 (1975)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1129kz