Dresden 2003 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 14: Postersitzung III (Neue u. unkonventionelle Supraleiter, Anwendungen der Supraleitung, Dünne Schichten, JJs und SQUIDs, Schwere Fermionen, Kondo-Systeme)

TT 14.2: Poster

Mittwoch, 26. März 2003, 14:30–19:00, P2c

Efficient selfconsistent calculations of multiband superconductivity in UPd₂Al₃ — •Peter M. Oppeneer¹ and Georgios Varelogiannis² — ¹IFW Dresden — ²Nat. Technical University, Athens

An efficient physically motivated computational approach to multiband superconductivity is introduced and applied to the study of the unconventional gap symmetry in the heavy-fermion material UPd₂Al₃. Using realistic pairing potentials and accurate energy bands that are computed within density functional theory, self-consistent calculations demonstrate that the only accessible superconducting gap with nodes exhibits d-wave symmetry in the A_1g representation of the D_6h point group. Our results suggest that in a superconductor with gap nodes the prevailing gap symmetry is dictated by the constraint that nodes must be as far as possible from high-density areas.