Numerical study of the isotope effect in underdoped high-temperature superconductors: Calculation of the angle-resolved photoemission spectra

Abstract

We present a numerical study of the isotope effect on the angle resolved photoemission spectra (ARPES) in the undoped cuprates. By the systematic-error-free Diagrammatic Monte Carlo method, the Lehman spectral function of a single hole in the tt't''-J model in the regime of intermediate and strong couplings to optical phonons is calculated for normal and isotope substituted systems. We found that the isotope effect is strongly energy-momentum dependent, and is anomalously enhanced in the intermediate coupling regime while it approaches to that of the localized hole model in the strong coupling regime. We predict the strengths of effect as well as the fine details of the ARPES lineshape change. Implications to the doped case are also discussed.

5 pages, 5 figures

References in corpus (5)

• Polaronic behavior of undoped high-Tc cuprates
• Electron-phonon interaction in the t-J model
• High-energy photoemission on Fe3O4: Small polaron physics and the Verwey transition
• Direct Observation of High-Temperature Polaronic Behavior In Colossal Magnetoresistive Manganites
• Dispersion of incoherent spectral features in systems with strong electron-phonon coupling

Cited by in corpus (6)

• Interplay between electron-phonon and Coulomb interactions in cuprates
• Charge dynamics of doped holes in high Tc cuprates - A clue from optical conductivity
• Polaronic features in the optical properties of the Holstein-t-J model
• Isotope effects in the Hubbard-Holstein model within dynamical mean-field theory
• Finite temperature spectral function of a hole in a quantum antiferromagnet and role of phonons
• Optical properties of the Holstein-t-J model from dynamical mean-field theory