Spin excitations in layered cuprates: a Fermi-liquid approach

Автор(и)

  • I. Eremin Max-Planck Institut für Physik Komplexer Systeme, Dresden D-01187, Germany
  • D. Manske Institut für Theoretische Physik, ETH Zürich, Hönggerberg, CH-8093 Zürich, Switzerland

DOI:

https://doi.org/10.1063/1.2215367

Ключові слова:

high-Tc cuprates, Fermi-liquid approach, Brillouin zone.

Анотація

We review some important aspects of the doping dependence of many physical properties of the high-Tc cuprates based on a Fermi liquid-like approach. In particular, we show that the spin fluctuation-mechanism of superconductivity on the basis of a microscopic Eliashberg approach supports the idea that the symmetry of the superconducting order parameter is of dx2-y2 -wave type. Furthermore, the renormalization of the quasiparticle spectrum caused by the scattering on spin fluctuations results in the so-called kink feature seen in ARPES. The peculiar momentum dependence of the spin fluctuations will result in a strong anisotropy of the renormalization at different parts of the first Brillouin zone and thus will lead to a strong anisotropy of the kink. Another important achievement of the microscopic Eliashberg approach is that the spin excitations spectrum renormalizes strongly below Tc due to occurrence of superconductivity with a dx2-y2 -wave order parameter which yields to a formation of the so-called resonance peak that can be viewed as a spin exciton. The topology of the Fermi surface and the momentum dependence of the superconducting gap explains the peculiar dispersion of the resonance peak in good agreement with experiments.

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Опубліковано

2006-04-21

Як цитувати

(1)
Eremin, I.; Manske, D. Spin Excitations in Layered Cuprates: A Fermi-Liquid Approach. Fiz. Nizk. Temp. 2006, 32, 683-699.

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