Electron spin coherence of phosphorus donors in silicon: Effect of environmental nuclei
Electron spin coherence of phosphorus donors in silicon: Effect of environmental nuclei
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DOI：
10.1103/physrevb.82.121201
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发表时间：
2010-09-02
影响因子：
3.7
通讯作者：
Itoh, Kohei M.
中科院分区：
文献类型：
--
作者：
Abe, Eisuke;Tyryshkin, Alexei M.;Itoh, Kohei M.
报道了同位素控制单晶中磷施主的电子顺磁共振(EPR)实验。通过改变Si-29的浓度f，从0.075%到99.2%，我们系统地研究了环境核自旋对施主电子自旋的影响。我们发现由核致光谱扩散引起的退相干时间的实验与理论符合得很好，说明在所研究的f范围内，核致退相干占主导地位。我们还观察到EPR线宽从平方根依赖到对f的线性依赖，这与理论预测是一致的。
We report electron paramagnetic resonance (EPR) experiments of phosphorus donors in isotopically controlled silicon single crystals. By varying the concentration of the Si-29 isotope, f, from 0.075% to 99.2%, we systematically study the effect of the environmental nuclear spins on the donor-electron spin. We find excellent agreement between experiment and theory for decoherence times due to nuclear-induced spectral diffusion, clarifying that the nuclear-induced decoherence is dominant in the range of f studied. We also observe that the EPR linewidth shows a transition from the square-root dependence to the linear dependence on f, in agreement with theoretical predictions.