Automated angle-scanning photoemission end-station with molecular beam epitaxy at KEK-PF BL-1C

In order to satisfy demands to study the electronic structure of quantum na nostructures, a VUV beamline and a high-resolution and high-throughput phot oemission end-station combined with a molecular beam epitaxy (MBE) system h ave been constructed at the BL-IC of the Photon Factory. An angle-resolved photoemission spectrometer, having high energy- and angular-resolutions; VG Microtech ARUPS10, was installed. The total energy resolution of 31 meV at the 60 eV of photon energy is achieved. For the automated angle-scanning p hotoemission, the electron spectrometer mounted on a two-axis goniometer ca n be rotated in vacuum by the computer-cont rolled stepping motors. Another distinctive feature of this end-station is a connection to a MBE chamber i n ultahigh vacuum (UHV). In this system, MBE-grown samples can be transferr ed into the photoemission chamber without breaking UHV. Photoemission spect ra of MBE-grown GaAs(001) surfaces were measured with high-resolution and b ulk and surface components are clearly resolved. (C) 2001 Elsevier Science B.V, All rights reserved.