Superconductivity of CeRhIn<sub>5</sub> under High Pressure

Muramatsu, Takaki; Tateiwa, Naoyuki; Kobayashi, Tatsuo; Shimizu, Katsuya; Amaya, Kiichi; Aoki, Dai; Shishido, Hiroaki; Haga, Yoshinori; Ōnuki, Yoshichika

doi:10.1143/jpsj.70.3362

Cited by 107 publications

(114 citation statements)

References 19 publications

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“…21. [80][81][82] It is remarkable that superconductivity in CeRhIn 5 , together with that in CeCoIn 5 , is observed in a wide pressure region from 1.6 to 5.2 GPa, compared to a small superconducting region, ranging from 2.2 to 2.8 GPa, and to a low transition temperature T sc ¼ 0:2 K at 2.4 GPa in CeIn 3 .…”

Section: )mentioning

confidence: 99%

Recent Advances in the Magnetism and Superconductivity of Heavy Fermion Systems

et al. 2004

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We present recent advances in the magnetism and superconductivity of rare earth and uranium compounds. Heavy fermions are formed on the basis of the competition between the RKKY interaction and the Kondo effect in these compounds. The application of pressure to these compounds is useful to control the electronic states in the antiferromagnets CeRh 2 Si 2 and CeRhIn 5 , and the ferromagnet UGe 2 . The quadrupole interaction or the quadrupole Kondo effect is found to be responsible for heavy fermions in PrFe 4 P 12 . A rich variety of superconducting properties are demonstrated: superconductivity of CeCoIn 5 and CeRhIn 5 in the vicinity of a quantum critical point, coexistence of ferromagnetism and superconductivity in UGe 2 , and superconductivity based on the quadrupole fluctuations in PrOs 4 Sb 12 , together with the relation between the superconducting transition temperature and the quasi-two dimensionality of the electronic states.

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Section: )mentioning

confidence: 99%

Recent Advances in the Magnetism and Superconductivity of Heavy Fermion Systems

et al. 2004

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“…The latter scenario is also assumed in CeRhIn 5 , mainly based on the subsistence of SC in a wide region around p c , the maximum in ρ 0 , and a T -linear resistivity (n ∼ 1). [32][33][34] Using our method could be an important ingredient for probing the existence of a CEP and the relevancy of VF, notably for SC, in these compounds. Nonetheless, another dissimilarity to CeCu 2 Si 2 may occur: The resistance drop associated with the delocalization may be less pronounced, which means experimentally less accessible, due to a lower lying CEP (more negative T cr ).…”

Section: General Relevancy Of ρ( P) Analysismentioning

confidence: 99%

Heavy fermion superconductor CeCu2Si2under high pressure: Multiprobing the valence crossover

Seyfarth

Rüetschi²,

Sengupta³

et al. 2012

Phys. Rev. B

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The first heavy fermion superconductor CeCu 2 Si 2 has not revealed all its striking mysteries yet. At high pressures, superconductivity is supposed to be mediated by valence fluctuations, in contrast to ambient pressure, where spin fluctuations most likely act as pairing glue. We have carried out a multiprobe (electric transport, thermopower, ac specific heat, Hall and Nernst effects) experiment up to 7 GPa on a high-quality CeCu 2 Si 2 single crystal. For the first time, the resistivity data make it possible quantitatively to draw the valence crossover line within the p-T plane and to locate the critical end point at 4.5 ± 0.2 GPa and a slightly negative temperature. In the same pressure region, remarkable features have also been detected in the other physical properties, presumably acting as further signatures of the Ce valence crossover and the associated critical fluctuations: We observe maxima in the Hall and Nernst effects and a sign change and a strong sensitivity on magnetic field in the thermopower signal.

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“…[79][80][81] Hence, the sharp valence crossover originating from the QCP of the valence transition may be induced by applying pressure to CeRhIn 5 . Namely, the viewpoint of the closeness to the QCP of the FOVT is important in elucidating the T-h-P (chemical doping) phase diagram of these compounds in a consistent way.…”

Section: Cerhinmentioning

confidence: 99%

Valence Fluctuations Revealed by Magnetic Field and Pressure Scans: Comparison with Experiments in YbXCu₄(X=In, Ag, Cd) and CeYIn₅(Y=Ir, Rh)

et al. 2009

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The mechanism of how critical end points of the first-order valence transition (FOVT) are controlled by a magnetic field is discussed. We demonstrate that critical temperature is suppressed to be a quantum critical point (QCP) by a magnetic field. This results explain the field dependence of the isostructural FOVT observed in Ce metal and YbInCu 4 . Magnetic field scan can make the system reenter in a critical valence fluctuation region. Even in intermediate-valence materials, the QCP is induced by applying a magnetic field, at which magnetic susceptibility also diverges. The driving force of the field-induced QCP is shown to be a cooperative phenomenon of the Zeeman effect and the Kondo effect, which creates a distinct energy scale from the Kondo temperature. The key concept is that the closeness to the QCP of the FOVT is vital in understanding Ce-and Yb-based heavy-fermions. This explains the peculiar magnetic and transport responses in CeYIn 5 (Y ¼ Ir, Rh) and metamagnetic transition in YbXCu 4 for X ¼ In as well as the sharp contrast between X ¼ Ag and Cd.

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Superconductivity of CeRhIn₅ under High Pressure

Cited by 107 publications

References 19 publications

Recent Advances in the Magnetism and Superconductivity of Heavy Fermion Systems

Recent Advances in the Magnetism and Superconductivity of Heavy Fermion Systems

Heavy fermion superconductor CeCu2Si2under high pressure: Multiprobing the valence crossover

Valence Fluctuations Revealed by Magnetic Field and Pressure Scans: Comparison with Experiments in YbXCu₄(X=In, Ag, Cd) and CeYIn₅(Y=Ir, Rh)

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Superconductivity of CeRhIn5 under High Pressure

Cited by 107 publications

References 19 publications

Recent Advances in the Magnetism and Superconductivity of Heavy Fermion Systems

Recent Advances in the Magnetism and Superconductivity of Heavy Fermion Systems

Heavy fermion superconductor CeCu2Si2under high pressure: Multiprobing the valence crossover

Valence Fluctuations Revealed by Magnetic Field and Pressure Scans: Comparison with Experiments in YbXCu4(X=In, Ag, Cd) and CeYIn5(Y=Ir, Rh)

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Superconductivity of CeRhIn₅ under High Pressure

Valence Fluctuations Revealed by Magnetic Field and Pressure Scans: Comparison with Experiments in YbXCu₄(X=In, Ag, Cd) and CeYIn₅(Y=Ir, Rh)