Efficient Selfconsistent Calculations of Multiband Superconductivity in UPd$_2$Al$_3$

Details Efficient Selfconsistent Calculations of Multiband Superconductivity in UPd$_2$Al$_3$ Efficient Selfconsistent Calculations of Multiband Superconductivity in UPd$_2$Al$_3$

2002-09-26

arxiv.org/abs/cond-mat/0209604v1

Physical Review B 68, 214512 (2003)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.68.214512

An efficient physically motivated computational approach to multiband superconductivity is introduced and applied to the study of the gap symmetry in a heavy-fermion, UPd$_2$Al$_3$. 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.

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