Abstract
We examine a three-terminal spin filter including an artificial potential created by antidot, scanning tunnel microscope (STM) tip, etc., fabricated on semiconductor heterostructures with strong spin-orbit interaction. When the potential is attractive and its strength is properly tuned, the resonant scattering takes place, which enhances the extrinsic spin Hall effect. As a result, the efficiency of the spin filter can be more than 50% when the potential is axially symmetric. The efficiency becomes smaller when the symmetry is broken, but we still expect an efficient spin filter unless the degree of asymmetry is too large.
| Original language | English |
|---|---|
| Pages (from-to) | 956-959 |
| Number of pages | 4 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 42 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2010 Feb |
Fingerprint
Keywords
- Antidot
- Resonant scattering
- Spin filter
- Spin Hall effect
- Spin-orbit interaction
ASJC Scopus subject areas
- Condensed Matter Physics
- Atomic and Molecular Physics, and Optics
- Electronic, Optical and Magnetic Materials
Cite this
Spin filter due to spin Hall effect with axially asymmetric potential. / Yokoyama, Tomohiro; Eto, Mikio.
In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 42, No. 4, 02.2010, p. 956-959.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Spin filter due to spin Hall effect with axially asymmetric potential
AU - Yokoyama, Tomohiro
AU - Eto, Mikio
PY - 2010/2
Y1 - 2010/2
N2 - We examine a three-terminal spin filter including an artificial potential created by antidot, scanning tunnel microscope (STM) tip, etc., fabricated on semiconductor heterostructures with strong spin-orbit interaction. When the potential is attractive and its strength is properly tuned, the resonant scattering takes place, which enhances the extrinsic spin Hall effect. As a result, the efficiency of the spin filter can be more than 50% when the potential is axially symmetric. The efficiency becomes smaller when the symmetry is broken, but we still expect an efficient spin filter unless the degree of asymmetry is too large.
AB - We examine a three-terminal spin filter including an artificial potential created by antidot, scanning tunnel microscope (STM) tip, etc., fabricated on semiconductor heterostructures with strong spin-orbit interaction. When the potential is attractive and its strength is properly tuned, the resonant scattering takes place, which enhances the extrinsic spin Hall effect. As a result, the efficiency of the spin filter can be more than 50% when the potential is axially symmetric. The efficiency becomes smaller when the symmetry is broken, but we still expect an efficient spin filter unless the degree of asymmetry is too large.
KW - Antidot
KW - Resonant scattering
KW - Spin filter
KW - Spin Hall effect
KW - Spin-orbit interaction
UR - http://www.scopus.com/inward/record.url?scp=76949091592&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=76949091592&partnerID=8YFLogxK
U2 - 10.1016/j.physe.2009.10.061
DO - 10.1016/j.physe.2009.10.061
M3 - Article
AN - SCOPUS:76949091592
VL - 42
SP - 956
EP - 959
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 4
ER -