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Determination of the gap anisotropy of heavy-fermion superconductors by point contacts

par De Wilde, Yannick ;Heil, Joachim;Jansen, Aloysius G. M.;Wyder, Peter
Référence Physica. C, Superconductivity, 235-240, PART 3, page (1915-1916)
Publication Publié, 1994-12

Article révisé par les pairs

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Résumé :

The study of Andreev-reflection process in Normal/Superconductor point-contacts provides direct information abourt the nodal structure of the superconducting eneregy gap Δ in momentum (k)-space. A comparative study of experimental point-contact results id performed on three heavy-fermion duperconductord: UPt3, CeCu2Si2 and URu2Si2. Th experimental data point clearly to a gap with zeroes for UPt3 while for CeCu2Si2 and URu2Si2 the gap would have a finite non-zero value everywhere in k-space. © 1994.