Anomalous Fermi Liquid Behavior of Overdoped High-Tc Superconductors

Abstract

According to a generic temperature vs. carrier-doping (T-p) phase diagram of high-temperature superconductors it has been proposed that as doping increases to the overdoped region they approach gradually a conventional (canonical) Fermi Liquid. However, Hall effect measurements in several systems reported by different authors show a still strong \emph{T}-dependence in overdoped samples. We report here electrical transport measurements of Y_{1-x}Ca_{x}Ba_{2}Cu_{3}O_{7-delta} thin films presenting a temperature dependence of the Hall constant, R_H, which does not present a gradual transition towards the T-independent behavior of a canonical Fermi Liquid. Instead, the T-dependence passes by a minimum near optimal doping and then increases again in the overdoped region. We discuss the theoretical predictions from two representative Fermi Liquid models and show that they can not give a satisfactory explanation to our data. We conclude that this region of the phase diagram in YBCO, as in most HTSC, is not a canonical Fermi Liquid, therefore we call it Anomalous Fermi Liquid.

arXiv comment9 pages, 12 figures, to be published in Phys. Rev. B

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Cited by in corpus (11)

• Ultra-high critical current densities of superconducting YBa${}_2$Cu${}_3$O${}_{7-\delta }$ thin films in the overdoped state
• Transport properties of the metallic state of overdoped cuprate superconductors from an anisotropic marginal Fermi liquid model
• Influence of Disorder on the Hall Effect in Bi${}_2$Sr${}_2$CuO${}_{6+\delta }$
• Self-energy renormalization around the flux phase in the $t-J$ model: Possible implications in underdoped cuprates
• Field Induced Nodal Order Parameter in the Tunneling Spectrum of YBa${}_2$Cu${}_3$O${}_{7-x}$ Superconductor
• Role of dynamical non-double-occupancy excitations on the quasiparticle damping of the $t-J$ model in the large-$N$ limit
• Oxygen incorporation in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ thin films: surface activation and degradation
• Transport properties of very overdoped nonsuperconducting Bi2Sr2CuO6+d thin films
• Fast track to the overdoped regime of superconducting YBa2Cu3O7-δ thin films via electrochemical oxidation
• Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature
• On the charged boson gas model as a theory of high Tc superconductivity