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Spin filtering devices based on ferromagnetic stripe modulated double quantum-dot structures

Brusheim, Patrik LU and Xu, Hongqi LU (2006) In Physical Review B (Condensed Matter and Materials Physics) 73(4).
Abstract
We report on a theoretical study of spin-dependent electron transport in double quantum dot structures, made from a two-dimensional electron gas, with a local magnetic field modulation. Spin-dependent conductance and probability density of electrons in the structures are calculated and the underlying physics of the results is discussed. We include in the study not only the magnetic field component perpendicular to the two-dimensional electron gas plane, but also a consideration of the in-plane component of the magnetic field. It is shown that giant spin polarization (similar to 100%) of the conductance, with tunable spin polarity, can be achieved with the double-dot structures. It is also shown that the structures can be used as efficient... (More)
We report on a theoretical study of spin-dependent electron transport in double quantum dot structures, made from a two-dimensional electron gas, with a local magnetic field modulation. Spin-dependent conductance and probability density of electrons in the structures are calculated and the underlying physics of the results is discussed. We include in the study not only the magnetic field component perpendicular to the two-dimensional electron gas plane, but also a consideration of the in-plane component of the magnetic field. It is shown that giant spin polarization (similar to 100%) of the conductance, with tunable spin polarity, can be achieved with the double-dot structures. It is also shown that the structures can be used as efficient spin filtering devices at temperatures well above that defined by the spin splitting energy. (Less)
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
73
issue
4
article number
045313
publisher
American Physical Society
external identifiers
  • wos:000235009700074
  • scopus:33244461055
ISSN
1098-0121
DOI
10.1103/PhysRevB.73.045313
language
English
LU publication?
yes
id
d314ba8f-d838-4dba-b2a9-afbe3d7bca93 (old id 908829)
date added to LUP
2016-04-01 16:46:50
date last changed
2021-02-17 06:10:34
@article{d314ba8f-d838-4dba-b2a9-afbe3d7bca93,
  abstract     = {We report on a theoretical study of spin-dependent electron transport in double quantum dot structures, made from a two-dimensional electron gas, with a local magnetic field modulation. Spin-dependent conductance and probability density of electrons in the structures are calculated and the underlying physics of the results is discussed. We include in the study not only the magnetic field component perpendicular to the two-dimensional electron gas plane, but also a consideration of the in-plane component of the magnetic field. It is shown that giant spin polarization (similar to 100%) of the conductance, with tunable spin polarity, can be achieved with the double-dot structures. It is also shown that the structures can be used as efficient spin filtering devices at temperatures well above that defined by the spin splitting energy.},
  author       = {Brusheim, Patrik and Xu, Hongqi},
  issn         = {1098-0121},
  language     = {eng},
  number       = {4},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Spin filtering devices based on ferromagnetic stripe modulated double quantum-dot structures},
  url          = {http://dx.doi.org/10.1103/PhysRevB.73.045313},
  doi          = {10.1103/PhysRevB.73.045313},
  volume       = {73},
  year         = {2006},
}