Abstract
We have proposed that quantum point contacts (QPCs) can be a useful tool for producing spin-polarized currents in the presence of Rashba spin-orbit (SO) interaction [J. Phys. Soc. Jpn. 74, 1934 (2005)]. No magnetic field is required. When the conductance through a QPC is quantized in units of 2e2/h, the current is spin-polarized in the transverse direction. This spin polarization, which can be larger than 50% in InGaAs heterostructures, is elucidated using the S-matrix formalism. We also examine transport properties of a QPC connected to a ferromagnetic lead and show how to detect the spin-polarized current from the QPC.
| Original language | English |
|---|---|
| Pages (from-to) | 557-559 |
| Number of pages | 3 |
| Journal | Physica Status Solidi (C) Current Topics in Solid State Physics |
| Volume | 4 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2007 |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Creation and detection of spin-polarized current using quantum point contact with spin-orbit interaction. / Yokouchi, Hiroto; Eto, Mikio.
In: Physica Status Solidi (C) Current Topics in Solid State Physics, Vol. 4, No. 2, 2007, p. 557-559.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Creation and detection of spin-polarized current using quantum point contact with spin-orbit interaction
AU - Yokouchi, Hiroto
AU - Eto, Mikio
PY - 2007
Y1 - 2007
N2 - We have proposed that quantum point contacts (QPCs) can be a useful tool for producing spin-polarized currents in the presence of Rashba spin-orbit (SO) interaction [J. Phys. Soc. Jpn. 74, 1934 (2005)]. No magnetic field is required. When the conductance through a QPC is quantized in units of 2e2/h, the current is spin-polarized in the transverse direction. This spin polarization, which can be larger than 50% in InGaAs heterostructures, is elucidated using the S-matrix formalism. We also examine transport properties of a QPC connected to a ferromagnetic lead and show how to detect the spin-polarized current from the QPC.
AB - We have proposed that quantum point contacts (QPCs) can be a useful tool for producing spin-polarized currents in the presence of Rashba spin-orbit (SO) interaction [J. Phys. Soc. Jpn. 74, 1934 (2005)]. No magnetic field is required. When the conductance through a QPC is quantized in units of 2e2/h, the current is spin-polarized in the transverse direction. This spin polarization, which can be larger than 50% in InGaAs heterostructures, is elucidated using the S-matrix formalism. We also examine transport properties of a QPC connected to a ferromagnetic lead and show how to detect the spin-polarized current from the QPC.
UR - http://www.scopus.com/inward/record.url?scp=50049121984&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=50049121984&partnerID=8YFLogxK
U2 - 10.1002/pssc.200673266
DO - 10.1002/pssc.200673266
M3 - Article
AN - SCOPUS:50049121984
VL - 4
SP - 557
EP - 559
JO - Physica Status Solidi (C) Current Topics in Solid State Physics
JF - Physica Status Solidi (C) Current Topics in Solid State Physics
SN - 1862-6351
IS - 2
ER -