Abstract
We propose a multi-terminal spin filter using a quantum dot with spin-orbit interaction. First, we formulate the spin Hall effect (SHE) in a quantum dot connected to three leads. We show that the SHE is significantly enhanced by the resonant tunneling if the level spacing in the quantum dot is smaller than the level broadening. We stress that the SHE is tunable by changing the tunnel coupling to the third lead. Next, we perform a numerical simulation for a multi-terminal spin filter using a quantum dot fabricated on semiconductor heterostructures. The spin filter shows an efficiency of more than 50% when the conditions for the enhanced SHE are satisfied.
| Original language | English |
|---|---|
| Article number | 436 |
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Nanoscale Research Letters |
| Volume | 6 |
| DOIs | |
| Publication status | Published - 2011 |
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ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
Cite this
Efficient spin filter using multi-terminal quantum dot with spin-orbit interaction. / Yokoyama, Tomohiro; Eto, Mikio.
In: Nanoscale Research Letters, Vol. 6, 436, 2011, p. 1-7.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Efficient spin filter using multi-terminal quantum dot with spin-orbit interaction
AU - Yokoyama, Tomohiro
AU - Eto, Mikio
PY - 2011
Y1 - 2011
N2 - We propose a multi-terminal spin filter using a quantum dot with spin-orbit interaction. First, we formulate the spin Hall effect (SHE) in a quantum dot connected to three leads. We show that the SHE is significantly enhanced by the resonant tunneling if the level spacing in the quantum dot is smaller than the level broadening. We stress that the SHE is tunable by changing the tunnel coupling to the third lead. Next, we perform a numerical simulation for a multi-terminal spin filter using a quantum dot fabricated on semiconductor heterostructures. The spin filter shows an efficiency of more than 50% when the conditions for the enhanced SHE are satisfied.
AB - We propose a multi-terminal spin filter using a quantum dot with spin-orbit interaction. First, we formulate the spin Hall effect (SHE) in a quantum dot connected to three leads. We show that the SHE is significantly enhanced by the resonant tunneling if the level spacing in the quantum dot is smaller than the level broadening. We stress that the SHE is tunable by changing the tunnel coupling to the third lead. Next, we perform a numerical simulation for a multi-terminal spin filter using a quantum dot fabricated on semiconductor heterostructures. The spin filter shows an efficiency of more than 50% when the conditions for the enhanced SHE are satisfied.
UR - http://www.scopus.com/inward/record.url?scp=84856061533&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856061533&partnerID=8YFLogxK
U2 - 10.1186/1556-276X-6-436
DO - 10.1186/1556-276X-6-436
M3 - Article
C2 - 21711500
AN - SCOPUS:84856061533
VL - 6
SP - 1
EP - 7
JO - Nanoscale Research Letters
JF - Nanoscale Research Letters
SN - 1931-7573
M1 - 436
ER -