论文标题
碳化硅中的旋转3/2颜色中心的电子核相互作用和电子结构：高场脉冲EPR和Endor研究
Electron nuclear interactions and electronic structure of spin 3/2 color centers in silicon carbide: A high-field pulse EPR and ENDOR study
论文作者
论文摘要
高频脉冲电子顺磁共振（EPR）和电子核双共振（ENDOR）用于澄清具有光学诱导的高温SPIN-3/2在六边形4H-，6H-，6H-和RHOMBIC 15R-硅碳中（SIC）中，具有光学诱导的高温Spin-3/2对齐的颜色中心的电子结构。该识别基于分解的配体超精细相互作用与碳和硅最近，最近和更遥远的邻居以及旋转状态的测定。证明基态和激发态具有旋转s = 3/2。从EPR和Endor结果提出的显微镜模型如下：顺磁性负电荷的硅空缺，该空位无折叠与位于SIC对称的C轴相邻位点上的非par磁中性碳空位无折叠。
High-frequency pulse electron paramagnetic resonance (EPR) and electron nuclear double resonance (ENDOR) were used to clarify the electronic structure of the color centers with an optically induced high-temperature spin-3/2 alignment in hexagonal 4H-, 6H- and rhombic 15R- silicon carbide (SiC) polytypes. The identification is based on resolved ligand hyperfine interactions with carbon and silicon nearest, next nearest and the more distant neighbors and on the determination of the spin state. The ground state and the excited state were demonstrated to have spin S = 3/2. The microscopic model suggested from the EPR and ENDOR results is as follows: a paramagnetic negatively charged silicon vacancy that is noncovalently bonded to a non-paramagnetic neutral carbon vacancy, located on the adjacent site along the SiC symmetry c-axis.
