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      Direct spectroscopic evidence for phase competition between the pseudogap and superconductivity in Bi2Sr2CaCu2O8+δ

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          Abstract

          In the high-temperature (T(c)) cuprate superconductors, a growing body of evidence suggests that the pseudogap phase, existing below the pseudogap temperature T*, is characterized by some broken electronic symmetries distinct from those associated with superconductivity. In particular, recent scattering experiments have suggested that charge ordering competes with superconductivity. However, no direct link of an interplay between the two phases has been identified from the important low-energy excitations. Here, we report an antagonistic singularity at T(c) in the spectral weight of Bi2Sr2CaCu2O(8+δ) as compelling evidence for phase competition, which persists up to a high hole concentration p ~ 0.22. Comparison with theoretical calculations confirms that the singularity is a signature of competition between the order parameters for the pseudogap and superconductivity. The observation of the spectroscopic singularity at finite temperatures over a wide doping range provides new insights into the nature of the competitive interplay between the two orders and the complex phase diagram near the pseudogap critical point.

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          Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor

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            Generic superconducting phase behavior in high-Tccuprates:Tcvariation with hole concentration inYBa2Cu3O7−δ

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              Magnetic-field-induced charge-stripe order in the high-temperature superconductor YBa2Cu3Oy

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                Author and article information

                Journal
                Nature Materials
                Nature Mater
                Springer Science and Business Media LLC
                1476-1122
                1476-4660
                January 2015
                November 2 2014
                January 2015
                : 14
                : 1
                : 37-42
                Article
                10.1038/nmat4116
                25362356
                b8eb5e03-a1f4-4da0-9c60-950b9140d2fe
                © 2015

                http://www.springer.com/tdm

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