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arXiv 1906.07539cond-mat.mtrl-sci
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立方In $_2$ O $_3$拉曼光谱中自由载流子的特征

Signatures of free carriers in Raman spectra of cubic In$_2$O$_3$

Manfred Ramsteiner, Johannes Feldl, Zbigniew Galazka

摘要:

讨论了自由载流子对$n$型In $_2$ O $_3$拉曼散射的影响.对于高质量的立方单晶,电子单粒子激发被揭示为在低于300 cm $^{-1}$的频率范围内的相对宽的拉曼特征。此外,在相同的频率范围内的离散声子线表现出不对称的Fano共振的线型特征。这两个观察到的光谱特征包含的潜力,用于定量测定的自由载流子浓度的$n$型在$_2$ O $_3$使用拉曼光谱作为一种非接触的实验技术。

英文摘要:

We discuss the influence of free carriers on the Raman scattering in $n$-type In$_2$O$_3$. For high-quality cubic single crystals, electronic single-particle excitations are revealed as a relatively broad Raman feature in the frequency range below 300~cm$^{-1}$. Furthermore, discrete phonon lines in the same frequency range exhibit asymmetric lineshapes characteristic for Fano resonances. The two observed spectral features contain the potential to be utilized for the quantitative determination of the free carrier concentration in $n$-type In$_2$O$_3$ using Raman spectroscopy as a contactless experimental technique.

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