Impurity effects in quasiparticle spectrum of high-Tc superconductors (Review Article)

Автор(и)

  • Yu.G. Pogorelov IFIMUP/Departamento de Física, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
  • M.C. Santos Departamento de Física, Universidade de Coimbra, R. Larga, Coimbra, 3004-535, Portugal
  • V.M. Loktev Bogolubov Institute for Theoretical Physics, NAN of Ukraine, 14b Metrologichna Str., 03143 Kiev, Ukraine

DOI:

https://doi.org/10.1063/1.3651472

Ключові слова:

high-Tc superconductors, impurity states, group expansions in interacting impurity centers.

Анотація

The revision is made of Green function methods that describe the dynamics of electronic quasiparticles in disordered superconducting systems with d-wave symmetry of order parameter. Various types of impurity perturbations are analyzed within the simplest T-matrix approximation. The extension of the common selfconsistent T-matrix approximation (SCTMA) to the so-called group expansions in clusters of interacting impurity centers is discussed and hence the validity criteria for SCTMA are established. A special attention is payed to the formation of impurity resonance states and localized states near the characteristic points of energy spectrum, corresponding to nodal points on the Fermi surface.

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Опубліковано

2011-06-21

Як цитувати

(1)
Pogorelov, Y.; Santos, M.; Loktev, V. Impurity Effects in Quasiparticle Spectrum of High-Tc Superconductors (Review Article):. Fiz. Nizk. Temp. 2011, 37, 803-828.

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