Laser ARPES on the cuprate superconductor Bi2212

We use 6 eV photons from the fourth harmonic of a Ti:Sapphire laser to perform ARPES on the cuprate superconductor Bi2212. The very low photon energy improves momentum resolution and reduces extrinsic background, offering the clearest picture yet of the single electron spectral function. We will present detailed analysis of the temperature dependence of the nodal spectral lineshapes and compare the predictions of Fermi liquid theory and marginal Fermi liquid theory to what is seen in the data. We will also discuss recent laser ARPES results for overdoped and underdoped Bi2212.