论文标题
8-PMMN硼苯的强各向异性光学特性：一项多体扰动研究
Strong anisotropic optical properties of 8-Pmmn borophene: a many-body perturbation study
论文作者
论文摘要
使用第一原理多体扰动理论，我们研究了8-硼苯的光学特性，以两个近似级别的水平； GW方法仅考虑电子电子相互作用和GW与包括电子孔耦合（电子孔耦合）结合使用的GW方法。带状结构表现出具有半金属特征的各向异性狄拉克锥。对于不同的光极化，获得了光吸收光谱，我们预测强烈的光吸光度各向异性。当将电子孔相互作用考虑时，由于具有各向异性激光激波波函数的结合激子的形成，吸收峰会经历全局红移。
Using first-principle many-body perturbation theory, we investigate the optical properties of 8- borophene at two levels of approximations; the GW method considering only the electron-electron interaction and the GW in combination with the Bethe-Salpeter equation including electron-hole coupling. The band structure exhibits anisotropic Dirac cones with semimetallic character. The optical absorption spectra are obtained for different light polarizations and we predict strong optical absorbance anisotropy. The absorption peaks undergo a global redshift when the electron-hole interaction is taken into account due to the formation of bound excitons which have an anisotropic excitonic wave function.
