Nuclear-spin-induced oscillatory current in spin-blockaded quantum dots.
Nuclear-spin-induced oscillatory current in spin-blockaded quantum dots.
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DOI：
10.1103/physrevlett.92.256803
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发表时间：
2003-09
影响因子：
8.6
通讯作者：
K. Ono;S. Tarucha
中科院分区：
文献类型：
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作者：
K. Ono;S. Tarucha
我们通过实验证明，在没有电子自旋翻转的情况下，电子通过gaas基双量子点的输运会受到环境核自旋态的影响。通过点的电流随磁场的变化而随时间振荡，周期可达200秒。在71Ga和69Ga的连续波交流磁场中，可以诱发核磁共振，从而抑制振荡。提出了核自旋动态极化的一种可能机制。
We show experimentally that electron transport through GaAs-based double quantum dots can be affected by ambient nuclear spin states in a certain regime where transport is blocked in the absence of electron spin flip. Current through the dots oscillates in time with a period up to 200 s depending on magnetic field. Oscillation is quenched by application of a continuous wave ac magnetic field which can induce nuclear magnetic resonance in 71Ga or 69Ga. A possible mechanism for dynamically polarizing the nuclear spins is proposed.