Momentum Dependence of Resonant Inelastic X-Ray Scattering Spectrum in Insulating Cuprates
Momentum Dependence of Resonant Inelastic X-Ray Scattering Spectrum in Insulating Cuprates
复制标题
绝缘铜氧化物中共振非弹性 X 射线散射谱的动量依赖性
DOI：
10.1103/physrevlett.83.3705
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发表时间：
1999
影响因子：
8.6
通讯作者：
S. Maekawa
中科院分区：
文献类型：
--
作者：
K. Tsutsui;T. Tohyama;S. Maekawa
通过使用具有第二和第三邻跳项的二维哈伯德模型中的小团簇的精确对角化技术，检查了绝缘铜酸盐中的共振非弹性 X 射线散射光谱。当入射光子能量调谐到 Cu $K$ 吸收边附近时，我们发现可以通过各向异性动量依赖性从光谱中提取未占据的上哈伯德带的特征。它们为理解空穴和电子掺杂超导体的不同行为提供了机会。
The resonant inelastic x-ray scattering spectrum in insulating cuprates is examined by using the exact diagonalization technique on small clusters in the two-dimensional Hubbard model with second and third neighbor hopping terms. When the incident photon energy is tuned near the Cu $K$ absorption edges, we find that the features of the unoccupied upper Hubbard band can be extracted from the spectrum through an anisotropic momentum dependence. They provide an opportunity for the understanding of the different behavior of hole- and electron-doped superconductors.