Staggered Pairing Phenomenology for UPd2Al3 and UNi2Al3
Abstract
We apply the staggered-pairing Ginzburg-Landau phenomenology to describe superconductivity in UPd2Al3 and UNi2Al3. The phenomenology was applied successfully to UPt3 so it explains why these materials have qualitatively different superconducting phase diagrams although they have the same point-group symmetry. UPd2Al3 and UNi2Al3 have a two-component superconducting order parameter transforming as an H-point irreducible representation of the space group. Staggered superconductivity can induce charge-density waves characterized by new Bragg peaks suggesting experimental tests of the phenomenology.
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