High-Resolution, Low-Temperature Photoemission Spectroscopy at the Hisor Linear Undulator Beamline

Abstract

In order to study the electronic states of solids, using high-resolution, low-temperature photoemission spectroscopy (PES) with tunable photon energies, we have constructed a high-resolution undulator beamline operating in the photon-energy range 26–300 eV at the compact 700 MeV electron-storage ring HiSOR located at Hiroshima University. By way of gas-phase experiments, with photon flux larger than 2 × 1010 photons/s, photon-energy resolving powers of E/ΔE > 16000 and 3800 were obtained at hν ~ 48 eV and ~ 244 eV, respectively. High-resolution PES experiments on evaporated Au at 8 K were performed at the beamline with a total energy resolution of ΔE = 12 meV at hν = 48 eV. Among the first experiments from the beamline, a resonant photoemission study of UNiSn is presented. The U 5f derived peak is significantly enhanced at hν = 98 eV.

New view of the occupied band structure of Mo(112)

“…The high-resolution angle-resolved photoemission spectroscopy (ARPES) was performed at the linear undulator beamline (BL-1) [41] of Hiroshima Synchrotron Radiation Center (HiSOR) at Hiroshima University, Japan. The surface of the Mo(112) sample was cleaned by the standard method of repeated annealing (at ~1400°C) in oxygen atmosphere with the oxygen partial pressure of ~1×10 -6 torr, followed by cycles of annealing at 1000-1300°C and flashing at ~1800°C, similar to the procedures used elsewhere [25][26][27][28]42].…”

Occupied and unoccupied electronic structure of Na doped MoS2(0001)

“…[8][9][10][17][18][19][20][21] This study addresses some of the deficiencies in our understanding in charge donor modifications to the MoS 2 (0001) band structure through a combined investigation of both the unoccupied and occupied electronic structure, detailing the changes in electronic structure that accompany Na adsorption, but without the complexities associated with intercalation. 17 The occupied states were measured by high-resolution angle-resolved photoemission spectroscopy (ARPES), performed at the linear undulator beamline (BL-1) 22 at the Hiroshima Synchrotron Radiation Center (HiSOR) at Hiroshima University, Japan, described elsewhere. 16 The energy resolution was limited by temperature, not the instrument, and estimated to be $30 meV for ARPES performed at room temperature.…”

Electronic Structure of Charge- and Spin-ControlledSr1−(x+y)Lax+yTi1Iwasawa1, Yamakawa2, Saitoh3 et al. 2006Phys. Rev. Lett.17170View full textAdd to dashboardCite

“…We will simply denote them as (0.1, 0.1), etc. All the measurements were carried out at BL-1 of Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University using a SCIENTA ESCA200 electron analyzer [8,9]. In order to obtain clean surface, we fractured the samples in situ in ultrahigh vacuum (better than 1×10 −10 Torr) at 50 K. The spectra were taken at 50 K using selected photon-energies (45.6, 50.0, and 150 eV), and the overall experimental energy resolution was set at 50 meV.…”