Аннотация
A laser-based angle resolved photoemission (ARPES) system utilizing
6 eV photons from the fourth harmonic of a mode-locked Ti:sapphire
oscillator is described. This light source greatly increases the
momentum resolution and photoelectron count rate, while reducing
extrinsic background and surface sensitivity relative to higher energy
light sources. In this review, the optical system is described, and
special experimental considerations for low-energy ARPES are discussed.
The calibration of the hemispherical electron analyzer for good low-energy
angle-mode performance is also described. Finally, data from the
heavily studied high Tc superconductor Bi2Sr2CaCu2O8+δ (Bi2212) is
compared to the results from higher photon energies.
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