Direct evidence for predominantly phonon-mediated pairing in high-temperature superconductors

Abstract

The spectra of the second derivative of tunneling current d^{2}I/dV^{2} in the high-temperature superconductors YBa_{2}Cu_{3}O_{7-δ} and Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} show clear dip and peak features due to strong coupling to the bosonic modes mediating electron pairing. The energies of all the peaks in -d^{2}I/dV^{2}-like spectra match precisely with the energies of the peaks in the phonon density of states obtained by inelastic neutron scattering. The results clearly demonstrate that the bosonic modes mediating the electron pairing are phonons and that high-temperature superconductivity arises primarily from strong coupling to multiple phonon modes.

4 pages, 3 figures

References in corpus (14)

• Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors
• Interplay of electron-lattice interactions and superconductivity in Bi2Sr2CaCu2O8+d
• Anisotropic electron-phonon interaction in the cuprates
• A relation between the resonance neutron peak and ARPES data in cuprates
• Mass-renormalized electronic excitations at ($\pi$, 0) in the superconducting state of $B{i}_{2}S{r}_{2}CaC{u}_2{O}_{8+\delta }$
• Direct observation of the oxygen isotope effect on the in-plane magnetic field penetration depth in optimally doped YBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Polaronic behavior of undoped high-Tc cuprates
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• Unconventional isotope effects in the high-temperature cuprate superconductors
• Identification of the bulk pairing symmetry in high-temperature superconductors: Evidence for an extended s-wave with eight line nodes
• Role of electron-phonon interaction in the strongly correlated cuprates superconductors
• Determination of the tunneling electron-phonon spectral function in high-Tc superconductors with energy dependence of the normal density of states
• Isotope effects and possible pairing mechanism in optimally doped cuprate superconductors
• Precise determination of the superconducting gap along the diagonal direction of Bi2Sr2CaCu2O8+y: Evidence for extended s-wave gap symmetry

Cited by in corpus (14)

• Determinant quantum Monte Carlo study of the two-dimensional single-band Hubbard-Holstein model
• Preeminent role of the Van Hove singularity in the strong-coupling analysis of scanning tunneling spectroscopy for two-dimensional cuprates
• Fine structure in the tunneling spectra of electron-doped cuprates: No coupling to magnetic resonance mode
• Pairing mechanism of high-temperature superconductivity: Experimental constraints
• Isotope effects in high-Tc cuprate superconductors: Ultimate proof for bipolaron theory of superconductivity
• Density of States Modulations from Oxygen Phonons in d-wave Superconductors: Reconciling Angle-Resolved Photoemission Spectroscopy and Scanning Tunneling Microscopy
• Doping-dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates
• Tunneling spectra of strongly coupled superconductors: Role of dimensionality
• High temperature superconductivity from realistic long-range Coulomb and Fröhlich interactions
• A microscopic modeling of phonon dynamics and charge response in NdCuO
• Predictions of highest Transition-temperature for electron-phonon superconductors
• Reply to Comment on the paper "Pairing mechanism of high-temperature superconductivity: Experimental constraints (arXiv:1012.2368)"
• Phonon dispersion and anomalies in one-layer high-temperature superconductors
• Phonon Dispersion Relationship and Oxygen Isotope Effect in Superconductor LaFeAsO