Coulomb "Blockade" of nuclear spin relaxation in quantum dots.
Coulomb "Blockade" of nuclear spin relaxation in quantum dots.
复制标题
量子点中核自旋弛豫的库仑“封锁”。
DOI：
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发表时间：
2001
影响因子：
8.6
通讯作者：
B. Altshuler
中科院分区：
文献类型：
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作者：
Y. Lyanda;I. Aleiner;B. Altshuler
我们研究了量子点中由于电子与二维气体交换而引起的核自旋弛豫机制。我们发现原子核自旋弛豫速率1/T(1)受库仑阻滞（CB）的显著影响，并可由栅极电压控制。在强自旋-轨道耦合的情况下，弛豫速率在CB峰附近最大，而在弱自旋-轨道耦合的情况下，1/T(1)的最大值在CB峰附近。
We study the mechanism of nuclear spin relaxation in quantum dots due to the electron exchange with the 2D gas. We show that the nuclear spin relaxation rate 1/T(1) is dramatically affected by the Coulomb blockade (CB) and can be controlled by gate voltage. In the case of strong spin-orbit (SO) coupling the relaxation rate is maximal in the CB valleys, whereas for the weak SO coupling the maximum of 1/T(1) is near the CB peaks.