High-Energy Kink in the Single-Particle Spectra of the Two-Dimensional Hubbard Model

Alexandru Macridin, M. Jarrell, Thomas Maier, and D. J. Scalapino
Phys. Rev. Lett. 99, 237001 – Published 3 December 2007

Abstract

Employing dynamical cluster quantum Monte Carlo calculations we show that the single-particle spectral weight A(k,ω) of the one-band two-dimensional Hubbard model displays a high-energy kink in the quasiparticle dispersion followed by a steep dispersion of a broad peak similar to recent angle-resolved photoemission spectroscopy results reported for the cuprates. Based on the agreement between the Monte Carlo results and a simple calculation which couples the quasiparticle to spin fluctuations, we conclude that the kink and the broad spectral feature in the Hubbard model spectra is due to scattering with damped high-energy spin fluctuations.

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  • Received 18 January 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.237001

©2007 American Physical Society

Authors & Affiliations

Alexandru Macridin1, M. Jarrell1, Thomas Maier2, and D. J. Scalapino3

  • 1University of Cincinnati, Cincinnati, Ohio 45221, USA
  • 2Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 3University of California, Santa Barbara, California 93106-9530, USA

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Issue

Vol. 99, Iss. 23 — 7 December 2007

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