Relation between resistivity and effective mass in heavy-fermion and A15 compounds

Miyake, Kazumasa; Matsuura, Tamifusa; Varma, C. M.

doi:10.1016/0038-1098(89)90729-1

Cited by 183 publications

(145 citation statements)

References 24 publications

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“…The inset of Fig. 7, whereÃ is plotted against T max 1 , indicates the crossover from the strongly to weakly correlated branches of the Kadowaki-Woods plot [19,20]. A comparison with the helium cell results from Ref.…”

Section: Resultsmentioning

confidence: 99%

Anisotropy, disorder, and superconductivity in CeCu₂Si₂under high pressure

Holmes

Jaccard

Jeevan

et al. 2005

J. Phys.: Condens. Matter

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Abstract. Resistivity measurements were carried out up to 8 GPa on single crystal and polycrystalline samples of CeCu 2 Si 2 from differing sources in the homogeneity range. The anisotropic response to current direction and small uniaxial stresses was explored, taking advantage of the quasi-hydrostatic environment of the Bridgman anvil cell. It was found that both the superconducting transition temperature T c and the normal state properties are very sensitive to uniaxial stress, which leads to a shift of the valence instability pressure P v and a small but significant change in T c for different orientations with respect to the tetragonal c-axis. Coexistence of superconductivity and residual resistivity close to the Ioffe-Regel limit around 5GPa provides a compelling argument for the existence of a valence-fluctuation mediated pairing interaction at high pressure in CeCu 2 Si 2 .

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Section: Resultsmentioning

confidence: 99%

Anisotropy, disorder, and superconductivity in CeCu₂Si₂under high pressure

Holmes

Jaccard

Jeevan

et al. 2005

J. Phys.: Condens. Matter

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“…To first approximation, the self-energy therefore becomes a sum of the two: ImS ¼ ImS elastic þ ImS inelastic 11,12,27 . The elastic component is commonly assumed to be independent of energy (o) and temperature T, but may depend on momentum (see Supplementary Fig.…”

Section: Methodsmentioning

confidence: 99%

“…and not on momentum (k) 11,12 . The Fermi liquid breakdown then appears as the cutoff energy o c vanishes although the electron coupling constant l and the a priori unknown function F remain constant.…”

mentioning

confidence: 99%

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

et al. 2013

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High-temperature superconductivity emerges from an un-conventional metallic state. This has stimulated strong efforts to understand exactly how Fermi liquids breakdown and evolve into an un-conventional metal. A fundamental question is how Fermi liquid quasiparticle excitations break down in momentum space. Here we show, using angle-resolved photoemission spectroscopy, that the Fermi liquid quasiparticle excitations of the overdoped superconducting cuprate La 1.77 Sr 0.23 CuO 4 is highly anisotropic in momentum space. The quasiparticle scattering and residue behave differently along the Fermi surface and hence the Kadowaki-Wood's relation is not obeyed. This kind of Fermi liquid breakdown may apply to a wide range of strongly correlated metal systems where spin fluctuations are present.

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“…The solid straight line satisfies (A/7-)hf = 1.0 x 10"®;incm (molK/mJ)", the empirical relation found by Kadowaki and Woods [66] for strongly correlated electron systems. The dashed line rep>-resent the proportionality constant (J4/7-)TM = 0.4 x 10~®/iQcm (moIK/mJ)-for common transition metals [151].…”

Section: Rogers Et Al (1967)mentioning

confidence: 99%