Magnetic Quantum Critical Point and Superconductivity in UPt3 Doped with Pd

A. de Visser, M. J. Graf, P. Estrela, A. Amato, C. Baines, D. Andreica, F. N. Gygax, and A. Schenck
Phys. Rev. Lett. 85, 3005 – Published 2 October 2000
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Abstract

Transverse-field muon spin relaxation measurements have been carried out on the heavy-fermion superconductor UPt3 doped with small amounts of Pd. We find that the critical Pd concentration for the emergence of the large-moment antiferromagnetic phase is 0.6at.%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.

  • Received 30 March 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.3005

©2000 American Physical Society

Authors & Affiliations

A. de Visser1, M. J. Graf2, P. Estrela1, A. Amato3, C. Baines3, D. Andreica4, F. N. Gygax4, and A. Schenck4

  • 1Van der Waals-Zeeman Institute, University of Amsterdam, 1018 XE Amsterdam, The Netherlands
  • 2Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467
  • 3Paul Scherrer Institute, CH-5232 Villigen, Switzerland
  • 4Institute for Particle Physics, ETH Zürich, PSI, CH-5232 Villigen, Switzerland

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Vol. 85, Iss. 14 — 2 October 2000

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