Evidence for Unconventional Strong-Coupling Superconductivity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow><mml:mi mathvariant="normal">P</mml:mi><mml:mi mathvariant="normal">r</mml:mi><mml:mi mathvariant="normal">O</mml:mi><mml:mi mathvariant="normal">s</mml:mi></mml:mrow><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">S</mml:mi><mml:mi mathvariant="normal">b</mml:mi></mml:mrow><mml:mn>12</mml:mn></mml:msub></mml:math>: An Sb

Kotegawa, Hisashi; Yogi, Mamoru; Imamura, Y.; Kawasaki, Yu; Zheng, Guojun; Kitaoka, Y.; Ohsaki, Shuji; Sugawara, Hitoshi; Aoki, Yuji; Sato, Hideyuki

doi:10.1103/physrevlett.90.027001

Cited by 185 publications

(115 citation statements)

References 20 publications

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“…Recent transverse field µSR [24] and Sb-NQR measurements [25] on PrOs 4 Sb 12 are consistent with an isotropic energy gap. Along with the specific heat, these measurements indicate strong coupling superconductivity.…”

Section: Superconducting State Of Pros 4 Sb 12mentioning

confidence: 78%

Superconductivity and the high-field ordered phase in the heavy-fermion compound PrOs₄Sb₁₂

Maple

Frederick

et al. 2003

J. Phys.: Condens. Matter

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Abstract.Superconductivity is observed in the filled skutterudite compound PrOs 4 Sb 12 below a critical temperature 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 excitied state at ∼ 10 K, and much higher temperature Γ 4 triplet and Γ 1 singlet excited states. 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.

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Section: Superconducting State Of Pros 4 Sb 12mentioning

confidence: 78%

Superconductivity and the high-field ordered phase in the heavy-fermion compound PrOs₄Sb₁₂

Maple

Frederick

et al. 2003

J. Phys.: Condens. Matter

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“…Among them PrOs 4 Sb 12 is a rather unique case [44,45,46]. Again the angular dependent thermal conductivity data [12,11] suggest i) the presence of two phases denoted A and B and ii) a gap ∆(k) with planar symmetry in A while one with axial symmetry in B phase (see Fig.…”

Section: Skutterudite Pros 4 Sb 12mentioning

confidence: 99%

Gap symmetry of superconducting borocarbide YNi2B2C and skutterudite PrOs4Sb12

et al. 2003

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Within the quasiclassical approximation we have studied the thermodynamics and the thermal conductivity in the vortex state in nodal superconductors (sc). Recent angle dependent magnetothermal conductivity results indicate a gap function ∆(k) corresponding to f-wave sc in Sr 2 RuO 4 and d-wave sc in CeCoIn 5 and κ-(ET)2Cu(NCS)2 respectively. More recently it is shown that ∆(k) in both YNi2B2C and PrOs4Sb12 have point nodes described by hybrid s+g wave gap function.

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“…The unconventional nature of this superconductivity (SC) has been proven by several studies [2,3]. The gap structure of the SC phase has been studied in the last decade, it has, however, not yet been fully understood [4,5].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Measurements of Elastic Constant and Resistivity near the T_c of Non-BCS-Type Superconductor PrOs4Sb12

Mombetsu¹,

Murazumi²,

Hiura³

et al. 2014

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

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We performed simultaneous measurements of the elastic constant C 11 and electrical resistance of the filled skutterudite compound PrOs 4 Sb 12 . The elastic constant C 11 shows a local minimum at around 3 K in 0 T, which shifts to low temperature in 3 T, and seems independent from the heavy fermion superconductivity (HFSC) of the present compound. The temperature and magnetic field dependences of the elastic constant C 11 are consistent with the calculated quadrupole susceptibility based on the crystalline electric field level scheme, indicating well localized 4f -electron states from Pr 3+ at low temperature. The present results strongly suggest that there is no relation between the HFSC and local charge fluctuation, due to off-center quantum tunnneling of the guest Pr 3+ , and also implies that the origin of the heavy fermion state of this compound is not a typical Kondo effect.

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Evidence for Unconventional Strong-Coupling Superconductivity inPrOs4Sb12: An Sb

Cited by 185 publications

References 20 publications

Superconductivity and the high-field ordered phase in the heavy-fermion compound PrOs₄Sb₁₂

Superconductivity and the high-field ordered phase in the heavy-fermion compound PrOs₄Sb₁₂

Gap symmetry of superconducting borocarbide YNi2B2C and skutterudite PrOs4Sb12

Simultaneous Measurements of Elastic Constant and Resistivity near the T_c of Non-BCS-Type Superconductor PrOs4Sb12

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Evidence for Unconventional Strong-Coupling Superconductivity inPrOs4Sb12: An Sb

Cited by 185 publications

References 20 publications

Superconductivity and the high-field ordered phase in the heavy-fermion compound PrOs4Sb12

Superconductivity and the high-field ordered phase in the heavy-fermion compound PrOs4Sb12

Gap symmetry of superconducting borocarbide YNi2B2C and skutterudite PrOs4Sb12

Simultaneous Measurements of Elastic Constant and Resistivity near the Tc of Non-BCS-Type Superconductor PrOs4Sb12

Contact Info

Product

Resources

About

Superconductivity and the high-field ordered phase in the heavy-fermion compound PrOs₄Sb₁₂

Superconductivity and the high-field ordered phase in the heavy-fermion compound PrOs₄Sb₁₂

Simultaneous Measurements of Elastic Constant and Resistivity near the T_c of Non-BCS-Type Superconductor PrOs4Sb12