Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-10-26
Phys. Rev. B 71, 014517 (2005)
Physics
Condensed Matter
Strongly Correlated Electrons
Extended version of cond-mat/0404385
Scientific paper
10.1103/PhysRevB.71.014517
We examine the momentum and energy dependence of the scattering rate of the high temperature cuprate superconductors using angle resolved photoemission spectroscopy. The scattering rate is of the form a + bw around the Fermi surface for under and optimal doping. The inelastic coefficient "b" is found to be isotropic. The elastic term, "a", however, is found to be highly anisotropic for under and optimally doped samples, with an anisotropy which correlates with that of the pseudogap. This is contrasted with heavily overdoped samples, which show an isotropic scattering rate and an absence of the pseudogap above T_c. We find this to be a generic property for both single and double layer compounds.
Campuzano Juan-Carlos
Chatterjee Utpal
Fretwell Helen M.
Kadowaki Kazuo
Kaminski Adam
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