Manifestation of the magnetic resonance mode in the nodal quasiparticle lifetime in superconducting cuprates

Details Manifestation of the magnetic resonance mode in the nodal quasiparticle lifetime in superconducting cuprates Manifestation of the magnetic resonance mode in the nodal quasiparticle lifetime in superconducting cuprates

2004-02-26

arxiv.org/abs/cond-mat/0402643v1

Phys. Rev. Lett. 92, 257006 (2004)

Physics

Condensed Matter

Superconductivity

rextex, 4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.92.257006

Studying the nodal quasiparticles in superconducting cuprates by photoemission with highly improved momentum resolution, we show that a new "kink" feature in the scattering rate is a key to uncover the nature of electron correlations in these compounds. Our data provide evidence that the main doping independent contribution to the scattering can be well understood in terms of the conventional Fermi liquid model, while the additional doping dependent contribution has a magnetic origin. This sheds doubt on applicability of a phonon-mediated pairing mechanism to high temperature superconductors.

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