Decoherence of nuclear spins due to direct dipole-dipole interactions probed by resistively detected nuclear magnetic resonance
Decoherence of nuclear spins due to direct dipole-dipole interactions probed by resistively detected nuclear magnetic resonance
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通过电阻检测核磁共振探测直接偶极-偶极相互作用导致的核自旋退相干
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Y. Hirayama
中科院分区：
文献类型：
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作者：
T. Ota;G. Yusa;N. Kumada;S. Miyashita;T. Fujisawa;Y. Hirayama
我们使用电阻检测核磁共振研究 GaAs 量子阱结构中核自旋的退相干。 75As 核的横向退相干时间 T2 是通过拉比型相干振荡以及使用自旋回波技术估算的。通过分析去耦技术获得的 T2，我们提取了偶极子-偶极子相互作用作为 GaAs 退相干来源的作用。在设备在外部磁场中倾斜的条件下，我们表现出由第一最近邻原子核之间的直接偶极子-偶极子相互作用的强度变化引起的增强的退相干。结果与简单的数值计算非常吻合。
We study decoherence of nuclear spins in a GaAs quantum well structure using resistively detected nuclear magnetic resonance. The transverse decoherence time T2 of 75As nuclei is estimated from Rabi-type coherent oscillations as well as by using spin-echo techniques. By analyzing T2 obtained by decoupling techniques, we extract the role of dipole-dipole interactions as sources of decoherence in GaAs. Under the condition that the device is tilted in an external magnetic field, we exhibit enhanced decoherence induced by the change in strength of the direct dipole-dipole interactions between first nearest-neighbor nuclei. The results agree well with simple numerical calculations.
影响因子：
64.8
作者：
Smet, JH;Deutschmann, RA;von Klitzing, K
通讯作者：
von Klitzing, K