Gorelik L Y, Kulinich S I, Shekhter R I, Jonson M, Vinokur V M
Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
Phys Rev Lett. 2005 Sep 9;95(11):116806. doi: 10.1103/PhysRevLett.95.116806.
We study transport of spin-polarized electrons through a magnetic single-electron transistor (SET) in the presence of an external magnetic field. Assuming the SET to have a nanometer size central island with a single-electron level we find that the interplay on the island between coherent spin-flip dynamics and Coulomb interactions can make the Coulomb correlations promote rather than suppress the current through the device. We find the criteria for this new phenomenon--Coulomb promotion of spin-dependent tunneling--to occur.
我们研究了在存在外部磁场的情况下，自旋极化电子通过磁性单电子晶体管（SET）的输运。假设该SET具有一个带有单电子能级的纳米尺寸中心岛，我们发现岛相干自旋翻转动力学与库仑相互作用之间的相互作用可以使库仑关联促进而非抑制通过该器件的电流。我们找到了这种新现象——自旋相关隧穿的库仑促进——发生的条件。
