Electronic phase diagram of high temperature copper oxide superconductors

Abstract

In order to understand the origin of high-temperature superconductivity in copper oxides, we must understand the normal state from which it emerges. Here, we examine the evolution of the normal state electronic excitations with temperature and carrier concentration in Bi2Sr2CaCu2O8 using angle-resolved photoemission. In contrast to conventional superconductors, where there is a single temperature scale Tc separating the normal from the superconducting state, the high- temperature superconductors exhibit two additional temperature scales. One is the pseudogap scale T*, below which electronic excitations exhibit an energy gap. The second is the coherence scale Tcoh, below which sharp spectral features appear due to increased lifetime of the excitations. We find that T* and Tcoh are strongly doping dependent and cross each other near optimal doping. Thus the highest superconducting Tc emerges from an unusual normal state that is characterized by coherent excitations with an energy gap.

5 pages, 4 figures. Published in Proc. Nat. Acad. Sci. vol. 108 pp 9346 (2011). Free to download

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• Charge-density-wave order with momentum $(2Q,0)$ and $(0,2Q)$ within the spin-fermion model: continuous and discrete symmetry breaking, preemptive composite order, and relation to pseudogap in hole-doped cuprates
• Emergence of coherence in the charge-density wave state of 2H-NbSe${}_2$
• Photoemission perspective on pseudogap, superconducting fluctuations, and charge order in cuprates: a review of recent progress
• Electron scattering, charge order, and pseudogap physics in La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$: An angle resolved photoemission spectroscopy study
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• From charge- and spin-ordering to superconductivity in the organic charge-transfer solids
• Vertical temperature-boundary of the pseudogap under the superconducting dome of the Bi2Sr2CaCu2O8+d phase-diagram
• Signatures of superconductivity and pseudogap formation in non-equilibrium nodal quasiparticles revealed by ultrafast angle-resolved photoemission
• Orbital selectivity causing anisotropy and particle-hole asymmetry in the charge density wave gap of $2H$-TaS${}_2$
• The Valence Transition Model of Pseudogap, Charge-Order and Superconductivity in Electron- and Hole-Doped Copper Oxides
• Disappearance of Superconductivity and a Concomitant Lifshitz Transition in Heavily-Overdoped Bi2Sr2CuO6 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy
• Influence of Optically Quenched Superconductivity on Quasiparticle Relaxation Rates in Bi2Sr2CaCu2O8+delta
• Dynamical Particle Hole Asymmetry in Cuprate Superconductors
• Unconventional high-energy-state contribution to the Cooper pairing in under-doped copper-oxide superconductor HgBa${}_2$Ca${}_2$Cu${}_3$O${}_{8+\delta }$
• High Temperature Superconductivity in the Cuprates
• Universal features in the photoemission spectroscopy of high temperature superconductors
• Destroying coherence in high temperature superconductors with current flow
• Unambiguous connection between the Fermi surface topology and the pseudogap in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+d}$
• Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$, Studied from both In-Plane and Out-of-Plane Magnetoresistance Measurements
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• Superconductor--Insulator Transition in a non-Fermi Liquid
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• Realistic estimates of superconducting properties for the cuprates: reciprocal-space diagrammatic expansion combined with variational approach
• Linking Dynamic and Thermodynamic Properties of Cuprates; an ARPES study of (CaLa)(BaLa)${}_2$Cu${}_3$O${}_y$
• High Temperature Superconductivity in the Cuprates: Materials, Phenomena and a Mechanism
• Revised phase diagram of the high-$T_c$ cuprate superconductor Pb-doped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ revealed by anisotropic transport measurements
• Ubiquitous suppression of the nodal coherent spectral weight in Bi-based cuprates
• Doped Holographic Superconductor in an External Magnetic Field
• Strange metal crossover in the doped holographic superconductor
• Crossover from Fermi Arc to Full Fermi Surface
• Pseudogap and charge dynamics in doped cuprates
• Coupled electronic and magnetic excitations in the cuprates and their role in the superconducting transition
• Thermal Hall Effect and Neutral Spinons in a Doped Mott Insulator
• Scalar correlators and normal modes in holographic neutron stars
• Crucial role of Internal Collective Modes in Underdoped Cuprates
• Intrinsic phase fluctuation and superfluid density in doped Mott insulators
• Superconductivity of Bad Fermions: Origin of Two Gaps in HTSC Cuprates
• Emergence of Fermi-liquid and BCS physics in overdoped cuprates
• Doping-induced evolution of the intrinsic hump and dip energies dependent on the sample fabrication conditions in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$