Signatures of Hundness in kagome metals
Signatures of Hundness in kagome metals
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戈薇金属中的洪德斯特征
DOI:
10.1103/physrevb.102.125130
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发表时间:
2020-03
影响因子:
3.7
通讯作者:
Haiyan Lu
中科院分区:
文献类型:
--
作者:
Li Huang;Haiyan Lu
By means of the density functional theory in combination with the dynamical mean-field theory, we tried to investigate the electronic structure of hexagonal FeGe, in which the Fe atoms form a quasi-two-dimensional lay- ered kagome lattice. We predict that it is a representative kagome metal characterized by orbital selective Dirac fermions and extremely flat bands. Furthermore, Fe’s 3d electrons are strongly correlated. They exhibit quite apparent signatures of electronic correlation induced by Hund’s rule coupling, such as spin-orbital separation with non-Fermi-liquid behavior and spin freezing at intermediate temperature. Thus, hexagonal FeGe can be regarded as an ideal platform to study the interplay of kagome physics and Hundness.
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