CREATION OF SPIN-POLARIZED CURRENT USING QUANTUM POINT CONTACTS AND ITS DETECTION

被引：0

作者：

Eto, M. ^{[1
]}

Hayashi, T. ^{[1
]}

Kurotani, Y. ^{[1
]}

Yokouchi, H. ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

来源：

CONTROLLABLE QUANTUM STATES: MESOSCOPIC SUPERCONDUCTIVITY AND SPRINTRONICS | 2008年

关键词：

D O I：

10.1142/9789812814623_0048

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 2e(2)/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 spill 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.

引用

页码：301 / 306

页数：6

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