Consistent Description of the Metallic Phase of Overdoped Cuprate Superconductors as an Anisotropic Marginal Fermi Liquid

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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“…This sudden change from DGpo 2 to po is accompanied by a marked kink in the dispersion (Fig. 2n) 27,28 .…”

Section: Resultsmentioning

confidence: 99%

“…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%

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

et al. 2013

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“…As a result, a quantitative comparison to the experimental data shows a substantial underestimate of the magnitude of the calculated temperature dependent resistance, e.g. see the comparison in Kokalj and McKenzie [20].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of charge transport of overdoped La2−xSrxCuO4<

et al. 2013

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The in-plane resistivity of the high-temperature oxide superconductor La2−xSrxCuO4 [LSCO] shows a strong growth of a contribution linear in temperature as the doping is reduced in the overdoped region toward optimal. This linear term is a signature of non-Fermi liquid behavior. We find that the appearance of a linear term in the resistivity can arise in a semiclassical Boltzmann transport theory which uses renormalized quasiparticle scattering rates derived in a functional renormalization group calculation and an empirical band structure fitted to angle-resolved photoemission spectroscopy data on LSCO. The linearized Boltzmann equation is solved numerically by discretizing the Brillouin zone in a way that fits best to the Fermi surface geometry. The main trends in the development of the anomalous temperature dependence are well reproduced. There is a substantial underestimation of the magnitude of the resistivity which is expected in view of the moderate to weak values we chose for the onsite repulsion to stay within the one-loop renormalization group approximation. The analysis was extended to the Seebeck coefficient with similar agreement with the main trends in the data.This article is accepted for publication (Jan. 2nd, 2013): Phys. Rev. B 87, 035129 (2013 http://link.aps.org/

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“…96 Theoretical reports also support the existence of self-energy contributions with properties which are different to the PG. 33,38,97,98 If only a single universal physics is mainly involved in the DSB, the role of isotropic self-energy effects must be discussed, because a strong doping dependence of this self-energy, mainly in UD, may mask the effects of the PG in the DSB for T c .…”

Section: -75mentioning

confidence: 99%

Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature

et al. 2014

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Hole doped cuprates show a superconducting critical temperature Tc which follows an universal dome-shaped behavior as function of doping. It is believed that the origin of superconductivity in cuprates is entangled with the physics of the pseudogap phase. An open discussion is whether the source of superconductivity is the same that causes the pseudogap properties. The t-J model treated in large-N expansion shows d-wave superconductivity triggered by non-retarded interactions, and an instability of the paramagnetic state to a flux phase or d-wave charge density wave (d-CDW) state. In this paper we show that self-energy effects near d-CDW instability may lead to a dome-shaped behavior of Tc. In addition, it is also shown that these self-energy contributions may describe several properties observed in the pseudogap phase. In this picture, although fluctuations responsible for the pseudogap properties leads to a dome-shaped behavior, they are not involved in pairing which is mainly non-retarded.

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Consistent Description of the Metallic Phase of Overdoped Cuprate Superconductors as an Anisotropic Marginal Fermi Liquid

Cited by 16 publications

References 34 publications

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

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

Numerical study of charge transport of overdoped La2−xSrxCuO4<

Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature

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