论文标题
Terahertz电子顺磁共振广义光谱椭圆法：4H-SIC中氮缺陷的磁反应
Terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry: The magnetic response of the nitrogen defect in 4H-SiC
论文作者
论文摘要
我们报告了Terahertz（THZ）电子顺磁共振普遍光谱椭圆法（THZ-EPR-GSE）。显示了与4H-SIC中与氮缺陷相关的自旋转变引起的磁反应的场和频率依赖性的测量值。 THZ-EPR-GSE分配了需要空腔，允许独立扫描字段和频率参数，并且不需要字段或频率调制。我们研究了六角形（$ h $）和立方（$ k $）协调的氮的自旋跃迁，包括与其核自旋耦合（i = 1），我们提出了一种模型方法，以考虑磁敏感性以说明自旋过渡。从THZ-EPR-GSE测量值我们可以充分确定自旋跃迁的极化特性，并使用磁场和频率依赖性Lorentzian振荡器线形函数获得$ G $和超精细分裂参数。我们提出频率扫描的THZ-EPR-GSE作为一种研究固态材料中旋转特性的一种新的多功能方法。
We report on terahertz (THz) electron paramagnetic resonance generalized spectroscopic ellipsometry (THz-EPR-GSE). Measurements of the field and frequency dependencies of the magnetic response due to the spin transitions associated with the nitrogen defect in 4H-SiC are shown as an example. THz-EPR-GSE dispenses with the need of a cavity, permits independently scanning field and frequency parameters, and does not require field or frequency modulation. We investigate spin transitions of hexagonal ($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.
