Quantitative comparison between electronic Raman spectra and angle-resolved photoemission spectra in superconducting state of Bi2212
Quantitative comparison between electronic Raman spectra and angle-resolved photoemission spectra in superconducting state of Bi2212
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Bi2212超导态电子拉曼光谱与角分辨光电发射光谱的定量比较
DOI：
10.1016/j.phpro.2013.04.047
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
S. Tajima and T. Sasagawa
中科院分区：
文献类型：
--
作者：
H. T. Nguyen;K. Tanaka;T. Masui;S. Miyasaka;S. Tajima and T. Sasagawa
本文用近优掺杂铜酸盐超导体Bi2Sr2CaCu2O8(Bi2212)的角分辨光电子能谱(ARPES)计算了B1G和B2G两种几何构型的电子喇曼散射(ERS)谱，T_c=92K。在远低于T_c的温度下，对超导态费米面进行了计算，并与实验数据进行了定量比较。结果表明，在B1G中有很好的一致性，而在B2G中的峰位置比实验值低了约100 cm-1。这一结果表明，散射率不足以解释拉曼光谱，应该考虑额外的贡献来重现ERS光谱。
In this paper we present the calculations of electronic Raman scattering (ERS) spectra for B1g and B2g geometries using angle- resolved photoemission spectroscopy (ARPES) spectra of nearly optimally doped cuprate superconductor Bi2Sr2CaCu2O8 (Bi2212), Tc=92K. Calculations were taken on the Fermi surface (FS) in the superconducting state at temperature well below Tc and the results were quantitatively compared to the experimental data. It shows that there is a good agreement in B1g while the peak position in B2g is about 100 cm-1lower than the experimental one. This result indicates that the scattering rate is not large enough to explain Raman spectra and additional contribution should be taken into account to reproduce ERS spectra.