Resonant Inelastic X-Ray Scattering Spectra of Cuprate Superconductors Predicted by Model of Fractionalized Fermions
Resonant Inelastic X-Ray Scattering Spectra of Cuprate Superconductors Predicted by Model of Fractionalized Fermions
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DOI：
10.7566/jpsj.90.074702
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发表时间：
2021-07-15
影响因子：
1.7
通讯作者：
Imada, Masatoshi
中科院分区：
文献类型：
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作者：
Imada, Masatoshi
基于电子被分解为两个分量的假设，对共振非弹性X射线散射（RIXS）的强度进行了理论分析。通过拟合铜氧化物高温超导体Bi2Sr2CaCu2O8+ δ的角分辨光电子能谱（ARPES）数据和Yamaji等人（arXiv：1903.08060）的机器学习结果，我们确定了描述电子分馏的两分量费米子模型的参数。RIXS光谱预测基于此配方。我们发现，相对于正常或赝能隙相的超导相的强度增强。由于增强是不寻常的，我们建议这可以作为一个关键的测试是否非常规的电子分馏捕获的铜氧化物超导性的本质。这种使用多个独立光谱数据的组合分析，在理论和机器学习见解的帮助下，被视为集成光谱学，为研究强相关电子系统中的困难开放问题开辟了一条新途径。
We theoretically analyze the intensity of the resonant inelastic X-ray scattering (RIXS) based on Ansatz that the electron is fractionalized into two components. By fitting the angle resolved photoemission spectroscopy (ARPES) data of a cuprate high-T-c superconductor Bi2Sr2CaCu2O8+delta and the subsequent machine learning results obtained before by Yamaji et al. (arXiv:1903.08060), we determine the parameters of the two-component fermion model that describes the electron fractionalization. The RIXS spectra are predicted based on this formulation. We find that the intensity is enhanced in the superconducting phase relative to the normal or pseudogap phase. Since the enhancement is unusual, we propose this can be used as a critical test whether the unconventional electron fractionalization captures the essence of the cuprate superconductivity. This type of combined analyses using multiple independent spectroscopy data, with the help of theoretical and machine learning insights, regarded as integrated spectroscopy opens a new route to study difficult open issues in strongly correlated electron systems.