论文标题
铁磁尖晶石的半导体电子结构$ \ mathbf {hg} \ mathbf {cr} _2 \ mathbf {se} _4 $由软X射线分辨光学镜头揭示
Semiconducting Electronic Structure of the Ferromagnetic Spinel $\mathbf{Hg}\mathbf{Cr}_2\mathbf{Se}_4$ Revealed by Soft-X-Ray Angle-Resolved Photoemission Spectroscopy
论文作者
论文摘要
我们研究了铁磁尖晶石的电子结构$ \ mathrm {hg} \ mathrm {cr} _2 \ mathrm {se} _4 $ by oft-x射线分辨光光谱光谱光谱光谱（SX-arpes）和第一原则计算。虽然一项理论研究预测该材料是一种磁性Weyl半学，但SX-ARPES测量值直接证明了铁磁相中半导体状态。基于与杂种功能的密度功能理论的频带计算重现了实验确定的频带隙值，并且计算出的频带分散与ARPES实验非常匹配。我们得出的结论是，在$ \ mathrm {hg} \ mathrm {cr} _2 \ mathrm {se} _4 _4 $ $ \ mathrm {hg} \ mathrm {hg} \ mathrm {cr} _4 $中的理论预测均未估计带隙，而该材料是ferromagnetic的半导体。
We study the electronic structure of the ferromagnetic spinel $\mathrm{Hg}\mathrm{Cr}_2\mathrm{Se}_4$ by soft-x-ray angle-resolved photoemission spectroscopy (SX-ARPES) and first-principles calculations. While a theoretical study has predicted that this material is a magnetic Weyl semimetal, SX-ARPES measurements give direct evidence for a semiconducting state in the ferromagnetic phase. Band calculations based on the density functional theory with hybrid functionals reproduce the experimentally determined band gap value, and the calculated band dispersion matches well with ARPES experiments. We conclude that the theoretical prediction of a Weyl semimetal state in $\mathrm{Hg}\mathrm{Cr}_2\mathrm{Se}_4$ underestimates the band gap, and this material is a ferromagnetic semiconductor.
