Spin excitations in layered cuprates: a Fermi-liquid approach

• Published in: Физика низких температур
• Date: 2006
• Main Authors: Eremin, I., Manske, D.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2006
• Subjects: Специальный выпуск superconductivity: XX years after the discovery
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/120209
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Spin excitations in layered cuprates: a Fermi-liquid
 approach / I.Eremin, D. Manske // Физика низких температур. — 2006. — Т. 32, № 6. — С. 683–699. — Бібліогр.: 45 назв. — англ.

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.