HIGH-RESOLUTION AND LOW-TEMPERATURE PHOTOEMISSION SPECTROSCOPY AT THE HISOR HELICAL-UNDULATOR BEAMLINE
HIGH-RESOLUTION AND LOW-TEMPERATURE PHOTOEMISSION SPECTROSCOPY AT THE HISOR HELICAL-UNDULATOR BEAMLINE
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DOI：
10.1142/s0218625x02002609
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发表时间：
2002-02
影响因子：
1.1
通讯作者：
M. Arita;K. Shimada;H. Namatame;M. Taniguchi
中科院分区：
文献类型：
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作者：
M. Arita;K. Shimada;H. Namatame;M. Taniguchi
我们报告了一个实验系统，专门用于高分辨率和低温光电子能谱安装在一个紧凑的700 MeV的电子存储环（希索）在广岛大学的螺旋波荡器光束线。在光束线处的3 m离面Eagle垂直入射单色器覆盖hν = 4-40 eV的光子能量范围。从蒸镀Au膜费米面附近的光电子能谱估计，在hν = 7.1和22.6 eV时，总能量分辨率分别为4.5和7.5 meV。我们还进行了Yb金属的光电子能谱测量，表现出高体敏光谱的激发低能量光子。高分辨率的光电子能谱的Y 1-xCaxTiO 3（x = 0.41）之间的金属和绝缘相的边界附近表现出异常的温度依赖性相比，正常的金属。
We report an experimental system dedicated for high-resolution and low-temperature photoemission spectroscopy installed on the helical-undulator beamline of a compact 700 MeV electron-storage ring (HiSOR) at Hiroshima University. A 3 m off-plane Eagle normal-incidence monochromator at the beamline covers the photon-energy range of hν = 4–40 eV. From the photoemission spectra near the Fermi edge of evaporated Au film, the total energy resolution was estimated to be 4.5 and 7.5 meV at hν = 7.1 and 22.6 eV, respectively. We have also performed photoemission measurements of Yb metal, which demonstrated highly bulk-sensitive spectra for the excitation by low energy photon. The high-resolution photoemission spectra of Y1 - xCaxTiO3 with x = 0.41 in the vicinity of the boundary between the metallic and insulating phases exhibited anomalous temperature dependence in comparison with those of normal metals.