Resistive detection of nuclear spins in a single quantum dot under Kondo effect regime
Resistive detection of nuclear spins in a single quantum dot under Kondo effect regime
复制标题
近藤效应下单量子点核自旋的电阻检测
DOI：
10.1103/physrevb.87.081303
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
and K. Kono
中科院分区：
文献类型：
--
作者：
M. Kawamura;D. Gottwald;K. Ono;T. Machida;and K. Kono
研究了近藤效应下半导体量子点（QD）中核自旋的动态极化和电阻探测。我们发现量子点的微分电导谱在磁场近藤效应下表现出滞后。核自旋与磁滞的相关性通过监测核磁共振信号的差分电导得到证实。我们将迟滞的起源归因于量子点中诱导的动态核自旋极化（DNP）。利用DNP，我们证明了近藤效应下量子点中核自旋弛豫速率的测量。
We study dynamic polarization and resistive detection of nuclear spins in a semiconductor quantum dot (QD) under the Kondo effect regime. We find that the differential conductance spectra of the QD exhibit hysteresis under the Kondo effect regime in magnetic fields. Relevance of nuclear spins to the hysteresis is confirmed by the detection of nuclear magnetic resonance signals by monitoring the differential conductance. We attribute the origin of the hysteresis to the dynamic nuclear spin polarization (DNP) induced in the QD. Using the DNP, we demonstrate nuclear spin relaxation rate measurements in the QD under the Kondo effect regime.