Anomalies in the Fermi surface and band dispersion of quasi-one-dimensional CuO chains in the high-temperature superconductor YBa2Cu4O8

Abstract

We have investigated the electronic states in quasi one dimensional (1D) CuO chains by microprobe Angle Resolved Photoemission Spectroscopy. We find that the quasiparticle Fermi surface consists of six disconnected segments, consistent with recent theoretical calculations that predict the formation of narrow, elongated Fermi surface pockets for coupled CuO chains. In addition, we find a strong renormalization effect with a significant kink structure in the band dispersion. The properties of this latter effect [energy scale (~40 meV), temperature dependence and behavior with Zn-doping] are identical to those of the bosonic mode observed in CuO2 planes of high temperature superconductors, indicating they have a common origin.

accepted in Phys. Rev. Lett

References in corpus (7)

• Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor
• Quantum Oscillations in the Underdoped Cuprate YBa2Cu4O8
• Shubnikov-de Haas oscillations in YBa_2Cu_4O_8
• de Haas-van Alphen oscillations in the underdoped cuprate YBa${}_2$Cu${}_3$O${}_{6.5}$
• Breakup of the Fermi surface near the Mott transition in low-dimensional systems
• Dual character of the electronic structure in YBa2Cu4O8: conduction bands of CuO2 planes and CuO chains
• Superconductivity in zigzag CuO chains

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• Magnetic-field-induced nonlocal effects on the vortex interactions in twin-free YBa2Cu3O7
• High magnetic field studies of the Vortex Lattice structure in YBa2Cu3O7
• Stoichiometry, structure, and transport in the quasi-one-dimensional metal, Li(0.9)Mo(6)O(17)
• Magnetic field-dependence of the basal-plane superconducting anisotropy in YBa2Cu4O8 from small-angle neutron scattering measurements of the vortex lattice
• Confinement and quantum anomaly in quasi-1D spinless fermion chains