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TT: Tiefe Temperaturen
TT 7: Korrelierte Elektronen: Schwere Fermionen
TT 7.3: Talk
Monday, March 8, 2004, 15:00–15:15, H19
Theory for Coexistence of Superconductivity and A-phase in CeCu2Si2 — •Matthias Neef and Gertrud Zwicknagl — Institut für Mathematische Physik, TU Braunschweig, Mendelsonstr.3, 38106 Braunschweig
We study the interplay between superconductivity and spin density waves in CeCu2Si2. We adopt realistic quasiparticle bands as calculated by means of Renormalized band method. The experimental data concerning the magnetic structure are confirmed. In addition we investigate the superconductivity states, which can either coexist with or expel the A-phase. Results are reported for magnetic susceptibility and thermodynamic properties. The phase diagram is discussed.