太赫兹电子顺磁共振广义椭圆偏振光谱：4H-SiC中氮缺陷的磁响应
Terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry: The magnetic response of the nitrogen defect in 4H-SiC
摘要：
我们报告了太赫兹（THz）电子顺磁共振广义椭圆偏振光谱法（THz-EPR-GSE）。作为一个例子，测量的磁场和频率的依赖性的磁响应，由于与氮缺陷的自旋跃迁在4H-SiC。THz-EPR-GSE不需要腔，允许独立地扫描场和频率参数，并且不需要场或频率调制。我们研究了六方（$h$）和立方（$k$）配位氮的自旋跃迁，包括与其核自旋（I = 1）的耦合，我们提出了一个模型方法的磁化率来解释自旋跃迁。从THz-EPR-GSE测量中，我们可以完全确定自旋跃迁的极化性质，并利用磁场和频率相关的洛伦兹振子线形函数，得到了$g$和超精细分裂参数。我们提出频率扫描THz-EPR-GSE作为一种新的和通用的方法来研究在固态材料中的自旋的性质。
英文摘要：
We report on terahertz (THz) electron paramagnetic resonance generalized spectroscopic ellipsometry (THz-EPR-GSE). Measurements of the field and frequency dependencies of the magnetic response due to the spin transitions associated with the nitrogen defect in 4H-SiC are shown as an example. THz-EPR-GSE dispenses with the need of a cavity, permits independently scanning field and frequency parameters, and does not require field or frequency modulation. We investigate spin transitions of hexagonal ($h$) and cubic ($k$) coordinated nitrogen including coupling with its nuclear spin (I=1), and we propose a model approach for the magnetic susceptibility to account for the spin transitions. From the THz-EPR-GSE measurements we can fully determine the polarization properties of the spin transitions and we obtain $g$ and hyperfine splitting parameters using magnetic field and frequency dependent Lorentzian oscillator lineshape functions. We propose frequency-scanning THz-EPR-GSE as a new and versatile method to study properties of spins in solid state materials.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
