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arXiv 0807.3654cond-mat.mes-hall
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强自旋轨道相互作用量子点中耦合自旋的动力学

Dynamics of coupled spins in quantum dots with strong spin-orbit interaction

A. Pfund, I. Shorubalko, K. Ensslin, R. Leturcq

摘要:

研究了InAs纳米线中双量子点中两电子自旋态的时间依赖性。在这个系统中,自旋轨道相互作用对受限电子的自旋态有着重要的影响。通过泡利自旋阻塞配置泵浦单电子允许通过它们对泵浦电流的影响来探测两个耦合自旋的动力学。我们观察到自旋弛豫的磁场依赖性不同于GaAs点,这可以解释为自旋轨道相互作用。振荡检测时间短于弛豫时间,我们归因于自旋态的相干演化。

英文摘要:

We investigated the time dependence of two-electron spin states in a double quantum dot fabricated in an InAs nanowire. In this system, spin-orbit interaction has substantial influence on the spin states of confined electrons. Pumping single electrons through a Pauli spin-blockade configuration allowed to probe the dynamics of the two coupled spins via their influence on the pumped current. We observed spin-relaxation with a magnetic field dependence different from GaAs dots, which can be explained by spin-orbit interaction. Oscillations were detected for times shorter than the relaxation time, which we attribute to coherent evolution of the spin states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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