论文标题
在生命方中电子相关性的空间位置
On the Spatial Locality of Electronic Correlations in LiFeAs
论文作者
论文摘要
我们解决了基于铁的超导体中自我的空间非局部性程度的问题，该主题受到了很大的关注。以生命值为典型的例子，我们从角度分辨光发射光谱（ARPES）数据中提取自能量。我们使用两个不同的电子结构参考：密度功能理论在局部密度近似和线性化的准粒子自我一致GW（LQSGW）中。我们发现，通过LQSGW参考，在空间上，局部动力学相关性提供了对实验数据的一致描述，并解释了数据的一些令人惊讶的方面，例如具有主导XZ/Yz特征的电子表面的实质性计划分散。因此，相关效应可以分为LQSGW和动态局部贡献很好地描述的静态非本地贡献。霍尔效应和电阻率数据显示与此描述一致。
We address the question of the degree of spatial non-locality of the self energy in the iron-based superconductors, a subject which is receiving considerable attention. Using LiFeAs as a prototypical example, we extract the self energy from angular-resolved photoemission spectroscopy (ARPES) data. We use two distinct electronic structure references: density functional theory in the local density approximation and linearized quasiparticle self consistent GW (LQSGW). We find that with the LQSGW reference, spatially local dynamical correlations provide a consistent description of the experimental data, and account for some surprising aspects of the data such as the substantial out of plan dispersion of the electron Fermi surface having dominant xz/yz character. Hence, correlations effects can be separated into static non-local contributions well described by LQSGW and dynamical local contributions. Hall effect and resistivity data are shown to be consistent with this description.
