Pairing in cuprates from high energy electronic states

Abstract

The in-plane optical conductivity of Bi2Sr2CaCu2O8+d thin films with small carrier density (underdoped) up to large carrier density (overdoped) is analyzed with unprecedented accuracy. Integrating the conductivity up to increasingly higher energies points to the energy scale involved when the superfluid condensate builds up. In the underdoped sample, states extending up to 2 eV contribute to the superfluid. This anomalously large energy scale may be assigned to a change of in-plane kinetic energy at the superconducting transition, and is compatible with an electronic pairing mechanism.

11 pages, 3 figures

References in corpus (10)

• Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
• Global and Local Measures of the Intrinsic Josephson Coupling in Tl2Ba2CuO6
• Absence of a pseudogap in the in-plane infrared response of Bi2Sr2CaCu2O(8+d)
• Frustrated kinetic energy, the optical sum rule, and the mechanism of superconductivity
• Optical sum rule violation, superfluid weight and condensation energy in the cuprates
• Do electrons change their c-axis kinetic energy upon entering the superconducting state?
• Quasiparticle Formation and Optical Sum Rule Violation in Cuprate Superconductors
• Superconductivity from Undressing
• Interlayer Conductivity in the Superconductor Tl-Ba-Cu-O: Energetics and Energy Scales
• Where is 99% of the condensation energy of Tl_2Ba_2CuO_y coming from?

Cited by in corpus (73)

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• Exact Superconducting Instability in a Doped Mott Insulator
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• Doping Dependence of the Redistribution of Optical Spectral Weight in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
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• The origin of the Meissner effect in new and old superconductors
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• Higher order effective low-energy theories
• Intermediate Coupling Model of the Cuprates
• Frequency-dependent Thermal Response of the Charge System and Restricted Sum Rules in La(2-x)Sr(x)CuO(4)
• Signature of antiferromagnetic long-range order in the optical spectrum of strongly correlated electron systems
• The in-plane electrodynamics of the superconductivity in Bi2Sr2CaCu2O8+d: energy scales and spectral weight distribution
• Mottness in High-Temperature Copper-Oxide Superconductors
• Kinetic-energy driven superconductivity in cuprate superconductors
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• Optical and thermodynamic properties of the high-temperature superconductor HgBa_2CuO_4+delta
• The Full Mottness
• Electromotive forces and the Meissner effect puzzle
• In-plane optical spectral weight transfer in optimally doped Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10}$
• Superconductivity-Induced Transfer of In-Plane Spectral Weight in Bi2Sr2CaCu2O8: Resolving a Controversy
• In-plane optical conductivity of La${}_{2-x}$Sr${}_x$CuO${}_4$: Reduced superconducting condensate and residual Drude-like response
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• Electron-hole asymmetry and superconductivity
• Emergence of Particle-Hole Symmetry near Optimal Doping in High-Temperature Copper Oxide Superconductors
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• Infrared Signature of the Superconducting State in Pr(2-x)Ce(x)CuO(4)
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• Thermodynamics of an Exactly Solvable Model for Superconductivity in a Doped Mott Insulator
• Optical sum increase due to electron undressing
• Breakdown of Strong-Coupling Perturbation Theory in Doped Mott Insulators
• Unconventional high-energy-state contribution to the Cooper pairing in under-doped copper-oxide superconductor HgBa${}_2$Ca${}_2$Cu${}_3$O${}_{8+\delta }$
• Model-Independent Sum Rule Analysis Based on Limited-Range Spectral Data
• Optical Sum Rule in Finite Bands
• Detecting a preformed pair phase: The response to a pairing forcing field
• Optical sum rule anomalies in the cuprates: interplay between strong correlation and electronic bandstructures
• Local Entropies across the Mott Transition in an Exactly Solvable Model
• Effect of orbital currents on the restricted optical sum rule
• Magnetic mechanism of quasiparticle pairing in hole-doped cuprate superconductors
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• Optical sum rule in metals with a strong interaction
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• An extended infrared study of the (p,T) phase diagram of the p-doped Cu-O plane
• Optical Integral and Sum Rule Violation
• Optical response of high-$T_c$ cuprates: possible role of scattering rate saturation and in-plane anisotropy
• Optical conductivity of unconventional charge density wave systems: Role of vertex corrections
• Optical sum in Nearly Antiferromagnetic Fermi Liquid Model
• Optical spectral weight distribution in d-wave superconductors
• Temperature Dependence of the Conductivity Sum Rule in the Normal State due to Inelastic Scattering
• Impact of a finite cut-off for the optical sum rule in the superconducting state
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