title: Electronic phase diagram of high-Tc cuprate superconductors from a mapping of the in-plane resistivity curvature.
abstract: We propose that resistivity curvature mapping (RCM) based on the in-plane resistivity data is a useful way to objectively draw electronic phase diagrams of high-Tc cuprates, where various crossovers are important. In particular, the pseudogap crossover line can be conveniently determined by RCM. We show experimental phase diagrams obtained by RCM for Bi2Sr2-zLazCuO6+delta, La2-xSrxCuO4, and YBa2Cu3Oy, and demonstrate the universal nature of the pseudogap crossover. Intriguingly, the electronic crossover near optimum doping depicted by RCM appears to occur rather abruptly, suggesting that the quantum-critical regime, if it exists, must be very narrow.
authors.affiliation: Central Research Institute of Electric Power Industry, Komae, Tokyo 201-8511, Japan. ando@criepi.denken.or.jp
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Ando
authors.forename: Seiki
authors.initials: S
authors.lastname: Komiya
authors.forename: Kouji
authors.initials: K
authors.lastname: Segawa
authors.forename: S
authors.initials: S
authors.lastname: Ono
authors.forename: Y
authors.initials: Y
authors.lastname: Kurita