Quasi-point versus point nodes in Sr_(2)RuO_(4), the case of a flat tight binding γ sheet

• P. Contreras ^[3] ; D. Osorio ^[1] ; S. Tsuchiya ^[2]
  1. [1] University of Pavia

     University of Pavia

     Pavía, Italia

     
  2. [2] Chuo University

     Chuo University

     Japón

     
  3. [3] Universidad of Los Andes, Merida, Venezuela

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• Localización: Revista Mexicana de Física, ISSN-e 0035-001X, Vol. 68, Nº. 6, 2022, págs. 988-995
• Idioma: inglés
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• Resumen

  • We perform a numerical study of the unitary regime as a function of disorder concentration in the imaginary part of the elastic scattering cross-section for the compound Sr_(2)RuO_(4) in the flat band non-disperse limit. By using a self-consistent tight binding (TB) method, we find a couple of families of Wigner probabilistic functions that help to explain macroscopically the distribution between Fermion dressed quasiparticles and Cooper pairs, and also the position of nodes in the order parameter for Sr2RuO4. Therefore, we are able to show that a TB model for the FS γ-sheet, numerically shows 4 point nodes in a flat γ sheet limit, or 4 quasi-point nodes for strong dispersión γ sheet limit in the reduced phase scattering space (RPS).