Hwang Jungseek
Department of Physics, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea. Photon Sciences, Brookhaven National Laboratory, Upton, NY 11973, United States of America.
J Phys Condens Matter. 2018 Oct 10;30(40):405604. doi: 10.1088/1361-648X/aaddca. Epub 2018 Aug 30.
Extended Drude model formalism has been successfully utilized for analyzing optical spectra of strongly correlated electron systems including heavy-fermion systems and high-T superconducting iron pnictides and cuprates. Furthermore, generalized Allen's formulas have been developed and applied to extract the electron-boson spectral density function from measured optical data of high temperature superconductors including cuprates in various material phases. Here we used a reverse process to obtain various optical quantities starting from two typical electron-boson spectral density model functions for three intriguing (normal, pseudogap, and d-wave superconducting) material phases in cuprates. We also assigned the calculated optical results to designated regions in the phase diagram of hole-doped cuprates and compared them with the corresponding measured optical spectra of BiSrCaCu [Formula: see text] (Bi-2212). This comparison suggested that this way of optical data analysis can be a convincing method to study correlated electrons in the copper oxide superconductors and other superconducting systems as well.
扩展德鲁德模型形式体系已成功用于分析强关联电子系统的光谱，包括重费米子系统、高温超导铁基氮化物和铜酸盐。此外，广义艾伦公式已被开发并应用于从包括处于各种材料相的铜酸盐在内的高温超导体的测量光学数据中提取电子 - 玻色子光谱密度函数。在这里，我们使用一种反向过程，从铜酸盐中三个有趣的（正常、赝能隙和d波超导）材料相的两个典型电子 - 玻色子光谱密度模型函数出发，获得各种光学量。我们还将计算得到的光学结果分配到空穴掺杂铜酸盐相图中的指定区域，并将它们与BiSrCaCu [公式：见原文]（Bi - 2212）相应的测量光学光谱进行比较。这种比较表明，这种光学数据分析方法也可以成为研究氧化铜超导体及其他超导系统中关联电子的一种有说服力的方法。
