Magnetic quantum critical point and superconductivity in UPt3 doped with Pd

Autor: de Visser A, M J, Graf, P, Estrela, A, Amato, C, Baines, D, Andreica, F N, Gygax, A, Schenck
Rok vydání: 2000
Zdroj: Physical review letters. 85(14)
ISSN: 0031-9007
Popis: Transverse-field muon spin relaxation measurements have been carried out on the heavy-fermion superconductor UPt (3) doped with small amounts of Pd. We find that the critical Pd concentration for the emergence of the large-moment antiferromagnetic phase is approximately 0.6 at. %Pd. At the same Pd content, superconductivity is completely suppressed. The existence of a magnetic quantum critical point in the phase diagram, which coincides with the critical point for superconductivity, provides evidence for ferromagnetic spin-fluctuation mediated odd-parity superconductivity, which competes with antiferromagnetic order.
Databáze: OpenAIRE