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首页> 外文期刊>Physica, B. Condensed Matter >Evaluation of the electron-TO-phonon interaction in polar crystals from experimental data
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Evaluation of the electron-TO-phonon interaction in polar crystals from experimental data

机译:根据实验数据评估极性晶体中电子与声子的相互作用

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The aim of this study was to determine the strengths of the coupling of electrons with the polar longwavelength transverse optical (TO) vibrations from infrared spectroscopy data. This determination is made by means of a simple relationship between the electron-TO-phonon interaction constant and material parameters, based on a parametrization of the electron-TO-phonon coupling in terms of the long-range dipole-dipole interaction. The combination of experimental data employed here allowed us to calculate directly the relevant constants for a number of representative polar insulators and to show that in ferroelectrics the interband electron-TO-phonon interaction at the Γ point is essentially strong. In these calculations, infrared spectroscopy methods proved to be an effective tool for study of the main properties of electron interaction with polar long-wavelength TO phonons.
机译:这项研究的目的是从红外光谱数据确定电子与极性长波横向光学(TO)振动的耦合强度。该确定是基于电子-声子-声子相互作用常数和材料参数之间的简单关系,基于电子-声子-声子耦合在远程偶极-偶极子相互作用方面的参数化。此处使用的实验数据的组合使我们能够直接计算许多代表性极性绝缘子的相关常数,并表明在铁电体中,Γ点处的带间电子-声子相互作用非常强。在这些计算中,红外光谱法被证明是研究极性长波TO声子与电子相互作用的主要特性的有效工具。

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