同位素纯化硅中硼受体的电子顺磁共振研究
Electron Paramagnetic Resonance of Boron Acceptors in Isotopically Purified Silicon
摘要：
在同位素纯化的28Si单晶中，发现Si中B受体的电子顺磁共振（EPR）谱线宽度显著减小。此外，EPR谱中的极窄子结构是可见的，对应于共振时吸收的微波的增强或减少。亚结构的起源归因于同时双激发和自旋弛豫在四能级自旋系统的受体。自旋布居模型定性地描述了实验结果。
英文摘要：
The electron paramagnetic resonance (EPR) linewidths of B acceptors in Si are found to reduce dramatically in isotopically purified 28Si single crystals. Moreover, extremely narrow substructures in the EPR spectra are visible corresponding to either an enhancement or a reduction of the absorbed microwave on resonance. The origin of the substructures is attributed to a combination of simultaneous double excitation and spin relaxation in the four level spin system of the acceptors. A spin population model is developed which qualitatively describes the experimental results.
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