Noncollinear magnetoconductance of a quantum dot
(2005) In Physical Review B. Condensed Matter and Materials Physics 72.- Abstract
- We study theoretically the linear conductance of a quantum dot connected to ferromagnetic leads. The dot level is split due to a noncollinear magnetic field or intrinsic magnetization. The system is studied in the noninteracting approximation, where an exact solution is given, and, furthermore, with Coulomb correlations in the weak tunneling limit. For the noninteracting case, we find an antiresonance for a particular direction of the applied field, noncollinear to the parallel magnetization directions of the leads. The antiresonance is destroyed by the correlations, giving rise to an interaction induced enhancement of the conductance. The angular dependence of the conductance is thus distinctly different for the interacting and... (More)
- We study theoretically the linear conductance of a quantum dot connected to ferromagnetic leads. The dot level is split due to a noncollinear magnetic field or intrinsic magnetization. The system is studied in the noninteracting approximation, where an exact solution is given, and, furthermore, with Coulomb correlations in the weak tunneling limit. For the noninteracting case, we find an antiresonance for a particular direction of the applied field, noncollinear to the parallel magnetization directions of the leads. The antiresonance is destroyed by the correlations, giving rise to an interaction induced enhancement of the conductance. The angular dependence of the conductance is thus distinctly different for the interacting and noninteracting cases when the magnetizations of the leads are parallel. However, for antiparallel lead magnetizations, the interactions do not alter the angle dependence significantly. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/644227
- author
- Pedersen, Jonas LU ; Thomassen, Jesper and Flensberg, Karsten
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B. Condensed Matter and Materials Physics
- volume
- 72
- article number
- 045341
- publisher
- American Physical Society
- external identifiers
-
- wos:000230890300124
- scopus:33749233609
- DOI
- 10.1103/PhysRevB.72.045341
- language
- English
- LU publication?
- yes
- id
- 18097a46-a54e-4516-8864-1239f1aa96b2 (old id 644227)
- date added to LUP
- 2016-04-04 10:51:45
- date last changed
- 2022-01-29 20:58:31
@article{18097a46-a54e-4516-8864-1239f1aa96b2,
abstract = {{We study theoretically the linear conductance of a quantum dot connected to ferromagnetic leads. The dot level is split due to a noncollinear magnetic field or intrinsic magnetization. The system is studied in the noninteracting approximation, where an exact solution is given, and, furthermore, with Coulomb correlations in the weak tunneling limit. For the noninteracting case, we find an antiresonance for a particular direction of the applied field, noncollinear to the parallel magnetization directions of the leads. The antiresonance is destroyed by the correlations, giving rise to an interaction induced enhancement of the conductance. The angular dependence of the conductance is thus distinctly different for the interacting and noninteracting cases when the magnetizations of the leads are parallel. However, for antiparallel lead magnetizations, the interactions do not alter the angle dependence significantly.}},
author = {{Pedersen, Jonas and Thomassen, Jesper and Flensberg, Karsten}},
language = {{eng}},
publisher = {{American Physical Society}},
series = {{Physical Review B. Condensed Matter and Materials Physics}},
title = {{Noncollinear magnetoconductance of a quantum dot}},
url = {{http://dx.doi.org/10.1103/PhysRevB.72.045341}},
doi = {{10.1103/PhysRevB.72.045341}},
volume = {{72}},
year = {{2005}},
}