Coexisting Holes and Electrons in High-Tc Materials: Implications from Normal State Transport

Abstract

Normal state resistivity and Hall effect are shown to be successfully modeled by a two-band model of holes and electrons that is applied self-consistently to (i) DC transport data reported for eight bulk-crystal and six oriented-film specimens of YBa2Cu3O7-δ, and (ii) far-infrared Hall angle data reported for YBa2Cu3O7-δ and Bi2Sr2CaCu2O8+δ. The electron band exhibits extremely strong scattering; the extrapolated DC residual resistivity of the electronic component is shown to be consistent with the previously observed excess thermal conductivity and excess electrodynamic conductivity at low temperature. Two-band hole-electron analysis of Hall angle data suggest that the electrons possess the greater effective mass.

arXiv comment22 pages, 7 figures, 4 tables and 78 references

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• Charge compensation and optimal stoichiometry in superconducting (Ca${}_x$La${}_{1-x}$)(Ba${}_{1.75-x}$La${}_{0.25+x}$)Cu${}_3$O${}_y$
• Model of charge triplets for high-T${}_c$ cuprates
• Concerning the superconducting gap symmetry in YBa2Cu3O7-δ, YBa2Cu4O8, and La2-xSrxCuO4 determined from muon spin rotation in mixed states of crystals and powders
• Resistivity tensor correlations in the mixed state of electron-doped superconductor Nd${}_{2-x}$Ce${}_x$CuO${}_{4+\delta }$
• High-$T_{\text{C}}$ superconductivity in Cs${}_3$C${}_{60}$ compounds governed by local Cs-C${}_{60}$ Coulomb interactions
• High-Tc Superconductivity in Ultra-thin Crystals: Implications for Microscopic Theory