Band structures of ferromagnetic manganese compounds studied by high-resolution low-temperature angle-resolved photoemission spectroscopy

1.铁磁MnSb （1-101）单晶体薄膜在GaAs上生长（001）单晶体使用热壁外延和角度集成的光发射和反向光发射已经完成。光发射和反向光发射特别图与那些MnSb bulk样品的一致性。所有观测到的光谱特征都很好地解释了由波段结构计算提供的国家的密度。从向上和向下旋转的Mn 3d-t D22 g D2波段的峰值分离，交换能量估计为~ 4 eV，而其价值略大于（~ 3eV）由波段结构计算给出。用氦灯和反向照相照相发射光谱已经在MnP、MnAs D20.95 Y D2 P Y D20.05 Y D2和MnBi上完成。The estimated exchange energies are ~ 4 eV for MnAsイイD20.95イD20.05イD2 and MnBi， and 1.6 eV for MnP.3.共振光发射光谱仪has been done on MnBi at Hiroshima同步辐射中心。研究表明MnBii中Mn 3d电子的强烈特征。一个高能量-分辨率光发射光谱仪已经连接到广岛同步辐射中心的电子存储环的光束线。我们相信，能源分辨率比3 meV好，而角形分辨率比[加-减] 0.1°。在不久的将来，我们将在使用同步加速器辐射的这一研究项目中对Mn化合物进行角度解析的光发射光谱分析。

1. Ferromagnetic MnSb (1-101) single crystal thin films have been grown on GaAs(001) single crystal using hot wall epitaxiy and angle-integrated photoemission and inverse-photomission have been done. The photoemission and inverse-photoemission spectra are consistent with those of MnSb bulk sample. The overall observed spectral features are well explained by the density of states given by the band-structure calculation. From the peak separation of the up- and down-spin Mn 3d-tィイD22gィエD2 bands, the exchange energy is estimated to be 〜4 eV, which is slightly larger than the value (〜3 eV) given by the band-structure calculation.2. Photoemission spectroscopy with helium lamp and inverse-photoemission spectroscopy have been done on MnP, MnAsィイD20.95ィエD2PィイD20.05ィエD2 and MnBi. The estimated exchange energies are 〜4 eV for MnAsィイD20.95ィエD2PィイD20.05ィエD2 and MnBi, and 1.6 eV for MnP.3. Resonant photoemission spectroscopy has been done on MnBi at Hiroshima Synchrotron Radiation Center. The resonant behavior indicates itinerant nature of Mn3d electrons in MnBi.4. A high energy-resolution photoemission spectrometer has been connected to the beamline of the electron storage ring at Hiroshima Synchrotron Radiation Center. We confirmed that the energy resolution was better than 3 meV and the angular resolution was better than 【plus-minus】0.1°. In the near future, we will perform angle-resolved photoemission spectroscopy on Mn compounds obtained in this research project using synchrotron radiation.