STM NMR and nuclear spin noise
STM NMR and nuclear spin noise
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DOI：
10.1103/physrevb.73.184429
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发表时间：
2006-05-01
影响因子：
3.7
通讯作者：
Manassen, Yishay
中科院分区：
文献类型：
--
作者：
Balatsky, A. V.;Fransson, J.;Manassen, Yishay
扫描隧道显微镜（STM）的隧穿电流波动可以揭示电子自旋的波动。我们考虑了电子自旋由于与核自旋耦合而产生的波动。我们认为电子自旋的噪声谱可以揭示由于超精细耦合而引起的核自旋动力学。我们发现STM隧道电流功率谱在拉莫尔频率和零频率下形成了主干线的超精细分裂卫星。我们还讨论了与核超精细场共振处或附近的射频场的作用。这种方法类似于电子核双共振，因为它允许人们通过它对电子自旋的影响间接地检测核自旋动力学。
Fluctuations of an electronic spin can be revealed in the tunneling current fluctuations of a scanning tunneling microscope (STM). We consider fluctuations of the electronic spin due to coupling to nuclear spin. We argue that the noise spectroscopy of electronic spin can reveal the nuclear spin dynamics due to hyperfine coupling. We find that the STM tunneling current power spectrum develops hyperfine split satellites of the main lines at Larmor frequency and at zero frequency. We also address the role of the rf field that is at or near the resonance with the nuclear hyperfine field. This approach is similar to electron nuclear double resonance in that is allows one to detect nuclear spin dynamics indirectly through its effect on electronic spin.