Experimental realization of a quantum spin pump

被引：268

作者：

Watson, SK ^{[1
]}

Potok, RM

Marcus, CM

Umansky, V

机构：

[1] Middlebury Coll, Dept Phys, Middlebury, VT 05753 USA

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Weizmann Inst Sci, Braun Ctr Submicron Res, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.91.258301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate the operation of a quantum spin pump based on cyclic radio-frequency excitation of a GaAs quantum dot, including the ability to pump pure spin without pumping charge. The device takes advantage of bidirectional mesoscopic fluctuations of pumped current, made spin dependent by the application of an in-plane Zeeman field. Spin currents are measured by placing the pump in a focusing geometry with a spin-selective collector.

引用

页数：4

共 33 条

[1] Adiabatic spin pumping through a quantum dot with a single orbital level [J].