Zeeman smearing of the Coulomb blockade
Zeeman smearing of the Coulomb blockade
复制标题
库仑封锁的塞曼涂抹
DOI：
10.1103/physrevb.64.161302
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
K. L. Hur
中科院分区：
文献类型：
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作者：
K. L. Hur
在平行磁场作用下，研究了通过单模良量子点接触(QPC)耦合到二维引线、电容耦合到背栅的大量子点的电荷涨落。塞曼项在QPC处引起了自旋向上和向下通道的传输几率之间的不对称性，对已经在低磁场下的颗粒电荷的量子化产生了显著的影响。在进行定量分析时，我发现栅极和引线之间的电容不是对数奇点，而是随着栅极电压的函数而减小的峰值。讨论了实验的适用性。
Charge fluctuations of a large quantum dot coupled to a two-dimensional lead via a single-mode good Quantum Point Contact (QPC) and capacitively coupled to a back-gate, are investigated in the presence of a parallel magnetic field. The Zeeman term induces an asymmetry between transmission probabilities for the spin-up and spin-down channels at the QPC, producing noticeable effects on the quantization of the grain charge already at low magnetic fields. Performing a quantitative analysis, I show that the capacitance between the gate and the lead exhibits - instead of a logarithmic singularity - a reduced peak as a function of gate voltage. Experimental applicability is discussed.