期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 82, 期 9, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3637464
关键词
Brillouin zones; Fermi surface; high-temperature superconductors; lasers; photoelectron spectroscopy; photoemission; time of flight spectroscopy
资金
- K&A Wallenberg foundation
- Swedish Research Council (VR)
We present an experimental setup for laser-based angle-resolved time-of-flight photoemission. Using a picosecond pulsed laser, photons of energy 10.5 eV are generated through higher harmonic generation in xenon. The high repetition rate of the light source, variable between 0.2 and 8 MHz, enables high photoelectron count rates and short acquisition times. By using a time-of-flight analyzer with angle-resolving capabilities, electrons emitted from the sample within a circular cone of up to +/- 15 degrees can be collected. Hence, simultaneous acquisition of photoemission data for a complete area of the Brillouin zone is possible. The current photon energy enables bulk sensitive measurements, high angular resolution, and the resulting covered momentum space is large enough to enclose the entire Brillouin zone in cuprate high-T-c superconductors. Fermi edge measurements on polycrystalline Au shows an energy resolution better than 5 meV. Data from a test measurement of the Au(111) surface state are presented along with measurements of the Fermi surface of the high-T-c superconductor Bi2Sr2CaCu2O8+delta (Bi2212). (C) 2011 American Institute of Physics. [doi: 10.1063/1.3637464]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据