Unmasking the nodal quasiparticle dynamics in cuprate superconductors using low-energy photoemission

Abstract

Nodal quasiparticles of Bi2Sr2CaCu2O8 have been studied by angle-resolved photoemission spectroscopy with high momentum and energy resolution. Low-energy tunable photons have enabled us to resolve a small nodal bilayer splitting, unmasking the intrinsic single-particle scattering rate. The nodal scattering rate is abruptly suppressed upon the superconducting transition, and shows a linear energy dependence at low energies, indicating the nontrivial effect of elastic scatterings on the quasiparticles. With increasing energy, the antibonding-band scattering rate becomes higher than the bonding one. The observations imply the character of the scatterers dominant at low energies.

4 pages, 5 figures

References in corpus (4)

• Laser ARPES, the sudden approximation, and quasiparticle-like peaks in Bi2Sr2CaCu2O8+delta
• Evidence for CuO conducting band splitting in the nodal direction of Bi-2212
• Nodal Quasiparticle Lifetimes in Cuprate Superconductors
• Parity of the Pairing Bosons in a High-Temperature Superconductor

Cited by in corpus (9)

• Development of a Vacuum Ultra-Violet Laser-Based Angle-Resolved Photoemission System with a Super-High Energy Resolution Better Than 1 meV
• Evolution of the electronic excitation spectrum with strongly diminishing hole-density in superconducting Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}
• An Isotopic Fingerprint of Electron-Phonon Coupling in High-Tc Cuprates
• Superconductivity-Induced Self-Energy Evolution of the Nodal Electron of Optimally-Doped Bi2212
• Superconducting electronic state in optimally doped YBa2Cu3O7-d observed with laser-excited angle-resolved photoemission spectroscopy
• Local quasiparticle lifetimes in a d-wave superconductor
• Doping-dependence of nodal quasiparticle properties in high-$T_{\mathrm{c}}$ cuprates studied by laser-excited angle-resolved photoemission spectroscopy
• Sheet Dependence on Superconducting Gap in Oxygen-Deficient Iron-based Oxypnictide Superconductors NdFeAs0.85
• Abrupt Onset of Second Energy Gap at Superconducting Transition of Underdoped Bi2212