Experimental setup for low-energy laser-based angle resolved photoemission spectroscopy

Abstract

A laser-based angle resolved photoemission (APRES) 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 T_c superconductor Bi2Sr2CaCu2O8+δ(Bi2212) is compared to the results from higher photon energies.

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References in corpus (8)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Spontaneous time reversal symmetry breaking in the pseudogap state of high-Tc superconductors
• Laser ARPES, the sudden approximation, and quasiparticle-like peaks in Bi2Sr2CaCu2O8+delta
• Evolution of Mid-gap States and Residual 3-Dimensionality in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Evidence for CuO conducting band splitting in the nodal direction of Bi-2212
• The transition from the adiabatic to the sudden limit in core level photoemission: A model study of a localized system
• Parity of the Pairing Bosons in a High-Temperature Superconductor
• Unadulterated spectral function of low energy quasiparticles: Bi-2212, nodal direction

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