Constituents of the "kink" in high-Tc cuprates

Details Constituents of the "kink" in high-Tc cuprates Constituents of the "kink" in high-Tc cuprates

2005-10-27

arxiv.org/abs/cond-mat/0510760v1

Phys. Rev. Lett. 97, 017002 (2006)

Physics

Condensed Matter

Superconductivity

revtex

Scientific paper

10.1103/PhysRevLett.97.017002

Applying the Kramers-Kronig consistent procedure, developed earlier, we investigate in details the formation of the quasiparticle spectrum along the nodal direction of high-Tc cuprates. The heavily discussed "70 meV kink" on the renormalized dispersion exhibits a strong temperature and doping dependence when purified from structural effects. This dependence is well understood in terms of fermionic and bosonic constituents of the self-energy. The latter follows the evolution of the spin-fluctuation spectrum, emerging below T* and sharpening below Tc, and is the main responsible for the formation of the kink in question.

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