电子掺杂铜氧化物的Lindhard和RPA磁化率的扩展动量空间计算
Lindhard and RPA susceptibility computations in extended momentum space in electron doped cuprates
摘要：
我们提出了一个有效的计算Lindhard磁化率$χ^{L}(q,ω)$在周期系统通过使用简单的产品的实空间函数和快速傅里叶变换（FFT）的近似。通过提供在几个布里渊区上延伸的电子掺杂的铜酸盐Nd $_{2-x}$ Ce $_{x}$ CuO $_{4}$的$χ^{L}(q,ω)$结果来说明该方法。这些结果是相关的解释非弹性X射线散射光谱从铜酸盐。
英文摘要：
We present an approximation for efficient calculation of the Lindhard susceptibility $χ^{L}(q,ω)$ in a periodic system through the use of simple products of real space functions and the fast Fourier transform (FFT). The method is illustrated by providing $χ^{L}(q,ω)$ results for the electron doped cuprate Nd$_{2-x}$Ce$_{x}$CuO$_{4}$ extended over several Brillouin zones. These results are relevant for interpreting inelastic X-ray scattering spectra from cuprates.
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