Magnetic quantum critical point and superconductivity in UPt3 doped with Pd

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 ~0.6 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.

4 pages (includes 3 figures); postscript file

References in corpus (8)

• The Order Parameter for the Superconducting Phases of UPt${}_3$
• Interplay of disorder and spin fluctuations in the resistivity near a quantum critical point
• Neutron-diffraction study of the evolution of antiferromagnetic order in UPt3 doped with Pd
• Magnetism in heavy-fermion U(Pt,Pd)3 studied by mSR
• Studies of superconductivity in U(Pt1-xPdx)3 for x < 0.006
• Suppression of Superconductivity in Single Crystals of UPt_3 by Pd Substitution
• Search for a quantum phase transition in U(Pt_(1-x)Pd_x)_3
• Muon localization site in U(Pt,Pd)3

Cited by in corpus (6)

• Singular Fermi Liquids
• Incommensurate Spin Fluctuations in the Spin-triplet Superconductor Candidate UTe${}_2$
• The Case for Phase Separation in $UR{u}_{2}S{i}_2$
• Ginzburg-Landau functional for nearly antiferromagnetic perfect and disordered Kondo lattices
• Metamagnetism, quantum criticality, hidden order and crystal electric fields in URu2Si2
• Onset of antiferromagnetism in UPt_{3} via Th-substitution studied by muon spin spectroscopy