Unified one-band Hubbard model for magnetic and electronic spectra of the parent compounds of cuprate superconductors
Unified one-band Hubbard model for magnetic and electronic spectra of the parent compounds of cuprate superconductors
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DOI：
10.1103/physrevb.85.100508
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发表时间：
2012-03-27
影响因子：
3.7
通讯作者：
Ronnow, H. M.
中科院分区：
文献类型：
--
作者：
Dalla Piazza, B.;Mourigal, M.;Ronnow, H. M.
利用单带t-t '-t '' Hubbard模型的低能投影，导出了有效自旋哈密顿量及其1/S阶自旋波展开式.我们适合几个母体化合物的高温超导铜酸盐La 2CuO 4，Sr 2CuO 2Cl 2，Bi 2Sr 2 YCu 2 O 8的自旋波色散。我们的准确定量测定的单波段哈伯德模型参数允许预测和比较实验结果。其中，我们讨论了两个磁振子拉曼峰线的形状，K边共振非弹性X射线散射500 meV峰，和高能量扭结角分辨光电子能谱准粒子色散，也被称为瀑布功能。
Using low-energy projection of the one-band t-t'-t '' Hubbard model we derive an effective spin Hamiltonian and its spin-wave expansion to order 1/S. We fit the spin-wave dispersion of several parent compounds to the high-temperature superconducting cuprates La2CuO4, Sr2CuO2Cl2, and Bi2Sr2YCu2O8. Our accurate quantitative determination of the one-band Hubbard model parameters allows prediction and comparison to experimental results. Among those we discuss the two-magnon Raman peak line shape, the K-edge resonant inelastic x-ray scattering 500-meV peak, and the high-energy kink in the angle-resolved photoemission spectroscopy quasiparticle dispersion, also known as the waterfall feature.