TY - GEN
T1 - Creation of spin-polarized current using quantum point contacts and its detection
AU - Eto, M.
AU - Hayashi, T.
AU - Kurotani, Y.
AU - Yokouchi, H.
PY - 2008/1/1
Y1 - 2008/1/1
N2 - We theoretically study the creation of spin-polarized current using quantum point contacts (QPCs) in the presence of Rashba spin-orbit interaction. When the conductance is quantized in units of 2e2/h, the current is spin-polarized in the transverse direction to the current flow. This is due to the transition between subbands of different spins during the transport through QPCs. No magnetic field is required. To detect the spin polarization of the current, we examine the transport properties of a QPC connected to a ferromagnetic lead. We observe the maximum (minimum) conductance when the magnetization in the lead is parallel or antiparallel (perpendicular) to the spin-polarization direction of the current from QPC.
AB - We theoretically study the creation of spin-polarized current using quantum point contacts (QPCs) in the presence of Rashba spin-orbit interaction. When the conductance is quantized in units of 2e2/h, the current is spin-polarized in the transverse direction to the current flow. This is due to the transition between subbands of different spins during the transport through QPCs. No magnetic field is required. To detect the spin polarization of the current, we examine the transport properties of a QPC connected to a ferromagnetic lead. We observe the maximum (minimum) conductance when the magnetization in the lead is parallel or antiparallel (perpendicular) to the spin-polarization direction of the current from QPC.
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U2 - 10.1142/9789812814623_0048
DO - 10.1142/9789812814623_0048
M3 - Conference contribution
AN - SCOPUS:84903890443
SN - 9812814612
SN - 9789812814616
T3 - MS+S 2006 - Controllable Quantum States: Mesoscopic Superconductivity and Spintronics, Proceedings of the International Symposium
SP - 301
EP - 306
BT - MS+S 2006 - Controllable Quantum States
PB - World Scientific Publishing Co. Pte Ltd
T2 - 4th International Symposium on Mesoscopic Superconductivity and Spintronics, MS+S 2006
Y2 - 27 February 2006 through 2 March 2006
ER -