Investigation of spin state in a quantum dot by using strongly asymmetric tunnel barriers
Investigation of spin state in a quantum dot by using strongly asymmetric tunnel barriers
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使用强不对称隧道势垒研究量子点中的自旋态
DOI：
10.1002/pssb.200303024
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Y. Hirayama
中科院分区：
文献类型：
--
作者：
T. Hayashi;T. Fujisawa;Y. Hirayama
利用强非对称隧道势垒研究了GaAs横向量子点的自旋态。饱和电流取决于电流极性，电流极性切换增加或减少总自旋的主导隧穿跃迁的方向。用这种方法研究了自旋极化和库仑相互作用。我们发现，在某些磁场区域出现的高自旋态可以通过考虑简单的库仑相互作用来理解。
We investigate the spin state of a GaAs lateral quantum dot (QD) by using strongly asymmetric tunnel barriers. The saturated current depends on the current polarity, which switches the direction of the dominant tunneling transition that increases or decreases the total spin. With this technique, the spin polarization and the Coulomb interaction are investigated. We find that high spin states appearing in some magnetic field regions can be understood by considering simple Coulomb interactions.