论文标题

非线性光学晶体CDGEP $ _2 $,zngep $ _2 $和CDSIP $ _2 $

Carrier transport and electron-lattice interactions of nonlinear optical crystals CdGeP$_2$, ZnGeP$_2$ and CdSiP$_2$

论文作者

Sooriyagoda, Rishmali, Piyathilaka, Herath P., Zawilski, Kevin T., Schunemann, Peter G., Bristow, Alan D.

论文摘要

Terahertz时域光谱法用于研究散装粉红细胞晶体的温度依赖性特性(CDGEP $ _2 $,ZNGEP $ _2 $和CDSIP $ _2 $)。复合光谱提供了折射和吸收,这是温度的函数,从中提取电子偶联和平均声子能量,并将其与A-和B位阳离子的力学联系起来。同样,交流电导率光谱提供载体密度和电子散射时间,其温度依赖性与无意的浅掺杂剂有关。散射时间的温度依赖性转化为载流子迁移率,并用显微镜传输机制(例如极光声子,声音声子,变形电位,电离杂质和脱位散射)进行建模。因此,分析将THZ光学和电子特性连接起来,以将微观载体传输和载体 - 武器相互作用相关联。

Terahertz time-domain spectroscopy is employed to investigate temperature-dependent properties of bulk chalcopyrite crystals (CdGeP$_2$, ZnGeP$_2$ and CdSiP$_2$). The complex spectra provide the refraction and absorption as a function of temperature, from which electron-phonon coupling and average phonon energies are extracted and linked to the mechanics of the A- and B-site cations. Also, AC conductivity spectra provide carrier densities and electron scattering times, the temperature dependence of which is associated with unintentional shallow dopants. Temperature dependence of the scattering time is converted into carrier mobility and modeled with microscopic transport mechanisms such as polar optical phonon, acoustic phonons, deformation potential, ionized impurity and dislocation scattering. Hence, analysis links the THz optical and electronic properties to relate microscopic carrier transport and carrier-lattice interactions.

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