用于SSRF现场电子结构研究的高分辨率ARPES终端站
High-resolution ARPES endstation for in-situ electronic structure investigations at SSRF
摘要：
角分辨光电子能谱（ARPES）是凝聚态物理中最有效的实验技术之一。同步加速器ARPES使用高通量和连续可调能量的光子，已变得特别重要。然而，一个优秀的同步辐射ARPES系统必须具有小束斑、超高能量分辨率和友好的操作界面等特点。在上海同步辐射装置上设计并建造了一条同步辐射光束线和一个终端站（BL 03 U）。样品位置的束斑尺寸为7.5（V）$μ$ m $\times$ 67（H）$μ$ m，基本光子范围为7-165 eV; ARPES系统能够实现能量分辨率为2.67 meV@21.2 eV的光电发射。此外，该终端站的ARPES系统配备了六轴低温样品操纵器（最低温度为7 K），并集成了氧化物分子束外延系统和扫描隧道显微镜，可为凝聚态物质精细电子结构的原位表征提供先进的平台。
英文摘要：
Angle-resolved photoemission spectroscopy (ARPES) is one of the most powerful experimental techniques in condensed matter physics. Synchrotron ARPES, which uses photons with high flux and continuously tunable energy, has become particularly important. However, an excellent synchrotron ARPES system must have features such as a small beam spot, super-high energy resolution, and a user-friendly operation interface. A synchrotron beamline and an endstation (BL03U) were designed and constructed at the Shanghai Synchrotron Radiation Facility. The beam spot size at the sample position is 7.5 (V) $μ$m $\times$ 67 (H) $μ$m, and the fundamental photon range is 7-165 eV; the ARPES system enables photoemission with an energy resolution of 2.67 meV@21.2 eV. In addition, the ARPES system of this endstation is equipped with a six-axis cryogenic sample manipulator (the lowest temperature is 7 K) and is integrated with an oxide molecular beam epitaxy system and a scanning tunneling microscope, which can provide an advanced platform for in-situ characterization of the fine electronic structure of condensed matter.
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