Low temperature specific heat of the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$

Abstract

We report the magnetic field dependence of the low temperature specific heat of single crystals of the first Pr-based heavy fermion superconductor PrOs${}_4$Sb${}_{12}$. The low temperature specific heat and the magnetic phase diagram inferred from specific heat, resistivity and magnetisation provide compelling evidence of a doublet ground state and hence superconductivity mediated by quadrupolar fluctuations. This establishes PrOs${}_4$Sb${}_{12}$ as a very strong contender of superconductive pairing that is neither electron-phonon nor magnetically mediated.

4 pages, 4 figures

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• Evidence for Unconventional Strong-coupling Superconductivity in PrOs_4Sb_12 : An Sb Nuclear Quadrupole Resonance (NQR) Study
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Cited by in corpus (61)

• Superconducting phases of f-electron compounds
• Time-Reversal Symmetry-Breaking Superconductivity in Heavy Fermion PrOs4Sb12 detected by Muon Spin Relaxation
• Unconventional Superconductivity
• Quadrupolar effect and rattling motion in heavy fermion superconductor PrOs_4Sb_{12}
• Limits on Superconductivity-Related Magnetization in Sr${}_2$RuO${}_4$ and PrOs${}_4$Sb${}_{12}$ from Scanning SQUID Microscopy
• The Crystal Field Potential of PrOs4Sb12: Consequences for Superconductivity
• Multiband superconductivity in the heavy fermion compound PrOs4Sb12
• Probing the superconducting gap symmetry of PrOs${}_4$Sb${}_{12}$: A penetration depth study
• Superconducting PrOs4Sb12: a thermal conductivity study
• Superconducting phase diagram of the filled skuterrudite PrOs4Sb12
• Very Low Temperature Tunnelling Spectroscopy in the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$
• Superconductivity and crystalline electric field effects in the filled skutterudite series Pr(Os${}_{1-x}$Ru${}_x$)${}_4$Sb${}_{12}$
• Superconductivity of La${}_3$Co${}_4$Sn${}_{13}$ and La${}_3$Rh${}_4$Sn${}_{13}$: A comparative study
• Pronounced enhancement of the lower critical field and critical current deep in the superconducting state of PrOs${}_4$Sb${}_{12}$
• Unconventional superconducting gap structure protected by space group symmetry
• Superconducting states in the tetrahedral compound PrOs4Sb12
• Transport properties of the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$
• High magnetic field phase diagram of PrOs4Sb12
• Strong-coupling theory of magnetic-exciton-mediated superconductivity in UPd${}_2$Al${}_3$
• A theory of new type of heavy-electron superconductivity in PrOs_4Sb_12: quadrupolar-fluctuation mediated odd-parity pairings
• Fermi surface evolution in the antiferromagnetic state for the electron-doped t-t'-t''-J model
• On Superconducting Double Transition in PrOs_4_Sb_12
• Evolution of crystalline electric field effects, superconductivity, and heavy fermion behavior in the specific heat of Pr(Os${}_{1-x}$Ru${}_x$)${}_4$Sb${}_{12}$
• Tunneling Spectra of Skutterudite PrOs_4Sb_{12}
• Crystalline electric field effects in the electrical resistivity of PrOs${}_4$Sb${}_{12}$
• Multiphase Superconductivity in Skutterudite PrOs_4Sb_12
• Probing the superconducting gap symmetry of PrRu${}_4$Sb${}_{12}$: A comparison with PrOs${}_4$Sb${}_{12}$
• Double superconducting transition in the filled skutterudite PrOs4Sb12 and sample characterizations
• Triplet superconductivity in the skutterudite PrOs_4Sb_12
• Time Reversal Symmetry Breaking in the B Phase of the Heavy Fermion Superconductor PrOs${}_4$Sb${}_{12}$
• Superconductivity and the high field ordered phase in the heavy fermion compound PrOs${}_4$Sb${}_{12}$
• Superconductivity in the presence of disorder in skutterudite-related La${}_3$Co${}_4$Sn${}_{13}$ and La${}_3$Ru${}_4$Sn${}_{13}$ compounds; electrical transport and magnetic studies
• Specific Heat Anomalies in Solids Described by a Multilevel Model
• Probing the superconductivity of PrPt4Ge12 through Ce substitution
• Exciton Mediated Superconductivity in PrOs4Sb12
• Eliashberg theory of superconductivity and inelastic rare-earth impurity scattering in filled skutterudite La${}_{1-x}$Pr${}_x$Os${}_4$Sb${}_{12}$
• Penetration depth, multiband superconductivity, and absence of muon-induced perturbation in superconducting PrOs${}_4$Sb${}_{12}$
• Mixed-parity superconductivity in centrosymmetric crystals
• Vortex state in double transition superconductors
• Evolution of superconducting order in Pr(Os${}_{1-x}$Ru${}_x$)${}_4$Sb${}_{12}$
• Symmetry properties of the nodal superconductor PrOs4Sb12
• Novel features in the flux-flow resistivity of the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$
• Supercondutivity in SnSb with natural superlattice structure
• Anomalous low temperature state of CeOs4Sb12: Magnetic field and La-impurity study
• Investigation of superconducting and normal-state properties of the filled-skutterudite system PrPt${}_4$Ge${}_{12-x}$Sb${}_x$
• The effective increase in atomic scale disorder by doping and superconductivity in Ca${}_3$Rh${}_4$Sn${}_{13}$
• Superconductivity and structural distortion in BaPt${}_2$As${}_2$
• Effect of atomic disorder and Ce doping on superconductivity of Ca3Rh4Sn13: Electric transport properties under high pressure
• 123Sb-NQR study of unconventional superconductivity in the filled skutterudite heavy-fermion compound PrOs4Sb12 under high pressure up to P = 3.82 GPa
• Superconductivity, magnetic order, and quadrupolar order in the filled skutterudite system Pr${}_{1-x}$Nd${}_x$Os${}_4$Sb${}_{12}$
• Transport of Charge and Spin in the Weak Link between Misoriented $PrO{s}_{4}S{b}_{12}$ Superconductors
• Nonadiabatic effects of rattling phonons and 4f excitations in Pr(Os{1-x}Ru{x})4Sb12
• Microscopic theories for cubic and tetrahedral superconductors: application to PrOs_4Sb_{12}
• Superconducting materials - a topical overview
• Revisiting spin ice physics in the ferromagnetic Ising pyrochlore Pr${}_2$Sn${}_2$O${}_7$
• Impurity induced density of states and residual transport in nonunitary superconductors
• Time-reversal symmetry violation and the structure of Superconducting Order Parameter of PrOs${}_4$Sb${}_{12}$
• Low energy inelastic response in the superconducting phases of $PrO{s}_{4}S{b}_{12}$
• Magnetic Phase Diagram of the Heavy-Fermion Superconductor PrOs4Sb12
• Landau theory of superconducting phases in T_h crystals
• Distorted vortex lattice in a tetrahedral superconductor