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首页> 外文期刊>Physical review. B, Condensed Matter And Materials Physics >Intraband and interband optical deformation potentials in femtosecond-laser-excited α-Te
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Intraband and interband optical deformation potentials in femtosecond-laser-excited α-Te

机译:飞秒激光激发的α-Te的带内和带间光学变形势

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摘要

We calculated the intraband and interband optical deformation potentials for semiconducting α-Te from experimental data of the band gap shrinkage and softening of the A_1-optical phonon mode in response to femtosecond laser excitation. These potentials were obtained by applying first- and second-order perturbation theory to the Froelich Hamiltonian describing the carrier-phonon interaction. The intraband optical deformation potential is considerably smaller than previously estimated values; there are no previously reported values for the interband optical deformation potential.
机译:我们根据带隙收缩和响应飞秒激光激发的A_1-光学声子模的带隙收缩和软化的实验数据计算了半导体α-Te的带内和带间光学变形势。通过将一阶和二阶微扰理论应用于描述载流子-声子相互作用的Froelich哈密顿量,可以获得这些电势。带内光学变形势比以前估计的值小得多。以前没有报告带间光学变形潜力的值。

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