Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 82, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3637464
Keywords
Brillouin zones; Fermi surface; high-temperature superconductors; lasers; photoelectron spectroscopy; photoemission; time of flight spectroscopy
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Funding
- K&A Wallenberg foundation
- Swedish Research Council (VR)
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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]
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