Parity of the Pairing Bosons in a High-Temperature Superconductor

Abstract

We report the observation of a novel effect in the bilayer Pb-Bi2212 high-TC superconductor by means of angle-resolved photoemission with circularly polarized excitation. Different scattering rates, determined as a function of energy separately for the bonding and antibonding copper-oxygen bands, strongly imply that the dominating scattering channel is odd with respect to layer exchange within a bilayer. This is inconsistent with a phonon-mediated scattering and favours the participation of the odd collective spin excitations in the scattering mechanism in near-nodal regions of the k-space, suggesting a magnetic nature of the pairing mediator.

arXiv comment5 RevTex pages, 4 eps figures

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Cited by in corpus (19)

• The effect of collective spin-1 excitations on electronic spectra in high-Tc superconductors
• Examining electron-boson coupling using time-resolved spectroscopy
• Constituents of the "kink" in high-Tc cuprates
• "Kinks", Nodal Bilayer Splitting and Interband Scattering in YBCO
• Experimental setup for low-energy laser-based angle resolved photoemission spectroscopy
• Unmasking the nodal quasiparticle dynamics in cuprate superconductors using low-energy photoemission
• Renormalization of Bulk Magnetic Electron States at High Binding Energies
• ARPES experiment in fermiology of quasi-2D metals (Review Article)
• An ARPES view on the high-Tc problem: phonons vs spin-fluctuations
• ARPES on HTSC: simplicity vs. complexity
• Aspects of Electron-Phonon Self-Energy Revealed from Angle-Resolved Photoemission Spectroscopy
• Strong-coupling analysis of scanning tunneling spectra in Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10+\delta }$
• A reevaluation of the coupling to a bosonic mode of the charge carriers in (Bi,Pb)${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ at the antinodal point
• Electron pockets and pseudogap asymmetry observed in the thermopower of underdoped cuprates
• Dual character of the electronic structure in YBa2Cu4O8: conduction bands of CuO2 planes and CuO chains
• Excitation of a bosonic mode by electron tunneling into a cuprate superconductor
• On the cuprates' universal waterfall feature: evidence of a momentum-driven crossover
• Controlling the carrier concentration of the high temperature superconductor Bi2Sr2CaCu2O{8+x} in Angle Resolved Photoemission Spectroscopy (ARPES) experiments
• Role of the upper branch of the hour-glass magnetic spectrum in the formation of the main kink in the electronic dispersion of high-T${}_{\text{c}}$ cuprate superconductors