![]() ![]() Alexandrov: “Logarithmic normal state resistivity of high-TcĬuprates”, Physics Letters A, Vol. 10.1103/PhysRevLett.77.4796 Search in Google Scholar Mott: “Coherent ab and c Transport Theory of High-TcĬuprates”, Physical Review Letters, Vol. Pines: “Model of c-axis resistivity of high TcĬuprates”, Physical Review B, Vol. Davis: Electron Processes in Non-Crystalline Materials, Clarendon, Oxford, 1979. 10.1103/PhysRevLett.77.5417 Search in Google Scholar Uchida, “Insulator-to-metal crossover in the normal state of La2−xĬuO4 near optimum doping”, Physical Review Letters, Vol. 10.1103/PhysRevLett.77.2065 Search in Google Scholar Steglich: “Metallic in-plane and divergent out-of-plane resistivity of a high-TcĬuprate in the zero-temperature limit”, Physical Review Letters, Vol. Mott: “Bipolarons”, Reports on Progress in Physics, Vol. Levin: “Model for c-axis transport in high Tc cuprates”, Physical Review B, Vol. 10.1103/PhysRevB.58.R611 Search in Google Scholar Nishihara: “Out-of-plane magnetoresistance of La2−xĬuO4: Evidence for interplanar scattering in the c-axis transport”, Physical Review B, Vol. 10.1103/PhysRevB.56.111 Search in Google Scholar Zoli: “c-axis resistivity in high-Tc superconductors”, Physical Review B, Vol. NATO ARW, Yalta (Ukraine), April 28–May 2, 1998, Kluwer, Dordrecht, 1998, pp. Petrova: “Renormalized phonon frequencies and electric resistivity along c-axis in single-plane high-temperature superconductors: A double-well analysis”, In: M. Superconductors”, Argonne National Laboratory, 1998, preprint. Abrikosov: “Resonant tunneling in high-Tc Levin: “Origin of intrinsic Josephson coupling in the cuprates and its relation to order parameter symmetry: An incoherent hopping model”, Physica C, Vol. Maple: “High temperature superconductivity”, Journal of Magnetism and Magnetic Materials, Vol. Summer School Workshop on Condensed Matter Physics, Canberra Australia, 1997, pp. Claycomb: “Classical and high-temperature superconductivity”, In: M.P. Zachar: “Spin-gap proximity effect mechanism of high temperature superconductivity”, Physical Review B, Vol. 10.1103/RevModPhys.60.585 Search in Google Scholar Superconductivity”, Reviews of Modern Physics, Vol. Müller: “Perovskite-type oxides-The new approach to high-Tc #Cooper srx freeA bond polaron dissociates to a free hole as it passes onto a neighboring O-O link. ![]() These “bond polarons” originate from carrier scattering by double-well potentials associated with the bonds. We attribute our conclusions to the drift of strong-coupling polarons along Cu−O bonds. Our analysis suggests that metal physics may not suffice if ionic features play a role in transport. AboveTĬross a metallic-like branch sets in, its αT character deriving from the field coupling of the migrating particle. These features shape the semiconductor-like branch below Tcross. We also find evidence for the admixture of 1- & 2-phonon absorptions below the Arrhenius range. We findT/ρ in good agreement with theT dependence of the quantum rate of migrating particles: AsT is raised, a zero-point rate at the lowestT is extended to a nearly flat plateau before a thermally activated branch sets in. To analyze ρ(T) we plottT/ρ againstT at various dopingsx for bothρĪb.T/ρ is inversely proportional to the traversal time across a potential barrier as an ionic particle drifts in an electric field. The temperatureT dependencies ρ(T) of normal state electric resistivitiesρĬ superconductors show common trends: AsT is raised, the resistivity first drops steeply before it starts rising αT above an apparent semiconductor-to-metal crossoverTĬross. ![]()
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