2003/03/19 by M. B. Maple, Pei-Chun Ho, P. -C. Ho +7 · 28 citations
Materials Science · Physics and Astronomy · #Atomic physics #Condensed matter physics #Critical field #Electrical resistivity and conductivity #Excited state #Ground state #Inelastic neutron scattering #Iron-based superconductors research #Magnetic susceptibility #Materials science #Neutron #Neutron scattering #Nuclear physics #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum critical point #Quantum phase transition #Rare-earth and actinide compounds #Skutterudite #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-8984/15/28/327
published in Journal of Physics Condensed Matter 15(28), S2071-S2080 (IOP Publishing) · 11 pages, 4 figures, presented at the 3rd international symposium on Advance Science Research (ASR 2002), JAERI Tokai, Ibaraki, Japan
arxiv created 2003/03/19 · openalex publication_date 2003/07/04 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Superconductivity is observed in the filled skutterudite compound PrOs 4 Sb 12 below a critical temperature T c = 1.85 K and appears to develop out of a nonmagnetic heavy Fermi liquid with an effective mass m ∗ ≈ 50 m e , where m e is the free electron mass. Features associated with a cubic crystalline electric field are present in magnetic susceptibility, specific heat, electrical resistivity, and inelastic neutron scattering measurements, yielding a Pr 3+ energy level scheme consisting of a Γ 3 nonmagnetic doublet ground state, a low-lying Γ 5 triplet excited state at ∼10 K, and Γ 4 triplet and Γ 1 singlet excited states at much higher temperatures. Measurements also indicate that the superconducting state is unconventional and consists of two distinct superconducting phases. At high fields and low temperatures, an ordered phase of magnetic or quadrupolar origin is observed, suggesting that the superconductivity may occur in the vicinity of a magnetic or quadrupolar quantum critical point.