Evidence for Magnetic-Field-Induced Quadrupolar Ordering in the Heavy-Fermion Superconductor PrOs<sub>4</sub>Sb<sub>12</sub>

Kohgi, M.; Iwasa, Kazuaki; Nakajima, M.; Metoki, Naoto; Araki, Shingo; Bernhoeft, N.; Mignot, J.-M.; Gukasov, Arsen; Sato, Hideyuki; Aoki, Yuji; Sugawara, Hitoshi

doi:10.1143/jpsj.72.1002

Cited by 218 publications

(174 citation statements)

References 11 publications

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“…PrOs 4 Sb 12 is cubic with T h point group symmetry 2 , and has a nonmagnetic ground state, which in a single ion scheme can be either a Γ 23 doublet or a Γ 1 singlet, a question which remains a matter of controversy. Presently, most measurements in high field seem to favor a singlet ground state 3,4,5,6 . In any case, whatever the degeneracy of this ground state, the first excited state (at around 6K) is low enough to allow for an induced electric quadrupolar moment on the Pr 3+ ions 7,8 , that could explain the heavy fermion properties of this system by a quadrupolar Kondo effect 1 .…”

Section: Introductionmentioning

confidence: 99%

Superconducting phase diagram of the filled skuterruditePrOs4Sb12

et al. 2004

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We present new measurements of the specific heat of the heavy fermion superconductor PrOs4Sb12, on a sample which exhibits two sharp distinct anomalies at Tc1 = 1.89K and Tc2 = 1.72K. They are used to draw a precise magnetic field-temperature superconducting phase diagram of PrOs4Sb12 down to 350 mK. We discuss the superconducting phase diagram of PrOs4Sb12 and its possible relation with an unconventional superconducting order parameter. We give a detailed analysis of Hc2(T ), which shows paramagnetic limitation (a support for even parity pairing) and multiband effects.

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Section: Introductionmentioning

confidence: 99%

Superconducting phase diagram of the filled skuterruditePrOs4Sb12

et al. 2004

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“…More systematic data on the superlattice peak position at various Q will help to reveal a correct propagation vector of the field-induced phase, which then leads to determination of the primary order parameter through the direction of the ordered moment, as done in the field-induced antiferroquadrupolar order in PrOs 4 Sb 12 [11,12].…”

Section: Resultsmentioning

confidence: 99%

Field-Induced Order in Heavy-Fermion Compound YbCo₂Zn₂₀

Kaneko

Raymond

Ressouche

et al. 2014

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)

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The field-induced ordered phase of heavy-fermion compound YbCo 2 Zn 20 was investigated by means of single crystal neutron diffraction. At an applied field of 11.8 T along the [11 1] direction, a superlattice peak was found at (3 21 2 1 2 ) at 200 mK, whereas no peak was detected at q=(1 0 0). In addition, broad diffuse scattering was revealed around induced superlattice peak. The present result evidences that the field-induced ordered phase has different character to the pressure induced antiferromagnetic ordered phase.

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“…It is evident that the heavy quasiparticles participate in the superconductivity, in that the specific heat jump C is comparable with γ T c [28]. It has also been demonstrated that the superconductivity develops out of a non-magnetic 1 crystalline electric field (CEF) ground state with a low lying 5 (using the notation for a cubic CEF) and that the application of magnetic fields larger than 4.5 T induces a high field ordered phase (HFOP) [28,260] which is thought to be due to antiferroquadrupolar ordering [261] (Fig. 25).…”

Section: Pros 4 Sb 12mentioning

confidence: 99%

Non-Fermi Liquid Regimes and Superconductivity in the Low Temperature Phase Diagrams of Strongly Correlated d- and f-Electron Materials

et al. 2010

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Standard models for simple metals and insulators often fail for systems based on elements with unstable d-or f -electron shells, where strong electronic correlations can generate new and unexpected states of matter. Such a scenario can often be induced when a magnetic phase transition is tuned to absolute zero temperature by an external control parameter such as chemical composition, pressure or magnetic field. At the resulting quantum critical point (QCP), emergent phenomena, such as unconventional superconductivity and novel magnetic phases are frequently observed. The temperature and energy dependences of the physical properties are also found to deviate from expectations for a simple Fermi liquid. This "non-Fermi-liquid" (NFL) behavior is commonly manifested as weak power laws and logarithmic divergences in the physical properties at low temperatures and is often found in a V-shaped region near a QCP, which has become the "classic" QCP phase diagram. However, there is also a growing number of materials where the NFL behavior either occurs far away from the QCP, within an ordered phase, or may not be associated with any putative QCP. Thus, after nearly 20 years of research, it remains unknown whether NFL physics is universal, or if a multitude of unique subclasses exist. In this article, we review research that has primarily been carried out in our laboratory on systems that exhibit NFL behavior that does not conform to the "classic" QCP scenario.

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Evidence for Magnetic-Field-Induced Quadrupolar Ordering in the Heavy-Fermion Superconductor PrOs₄Sb₁₂

Cited by 218 publications

References 11 publications

Superconducting phase diagram of the filled skuterruditePrOs4Sb12

Superconducting phase diagram of the filled skuterruditePrOs4Sb12

Field-Induced Order in Heavy-Fermion Compound YbCo₂Zn₂₀

Non-Fermi Liquid Regimes and Superconductivity in the Low Temperature Phase Diagrams of Strongly Correlated d- and f-Electron Materials

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Evidence for Magnetic-Field-Induced Quadrupolar Ordering in the Heavy-Fermion Superconductor PrOs4Sb12

Cited by 218 publications

References 11 publications

Superconducting phase diagram of the filled skuterruditePrOs4Sb12

Superconducting phase diagram of the filled skuterruditePrOs4Sb12

Field-Induced Order in Heavy-Fermion Compound YbCo2Zn20

Non-Fermi Liquid Regimes and Superconductivity in the Low Temperature Phase Diagrams of Strongly Correlated d- and f-Electron Materials

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Product

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Evidence for Magnetic-Field-Induced Quadrupolar Ordering in the Heavy-Fermion Superconductor PrOs₄Sb₁₂

Field-Induced Order in Heavy-Fermion Compound YbCo₂Zn₂₀