Photoemission "experiments" on holographic lattices
Filip Herček, Vladan Gecin, Mihailo Čubrović
SciPost Phys. Core 6, 027 (2023) · published 6 April 2023
- doi: 10.21468/SciPostPhysCore.6.2.027
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Abstract
We construct a 2D holographic ionic lattice with hyperscaling-violating infrared geometry and study single-electron spectral functions ("ARPES photoemission curves") on this background. The spectra typically show a three-peak structure, where the central peak undergoes a crossover from a sharp but not Fermi-liquid-like quasiparticle to a wide incoherent maximum, and the broad side peaks resemble the Hubbard bands. These findings are partially explained by a perturbative near-horizon analysis of the bulk Dirac equation. Comparing the holographic Green functions in imaginary frequency with the Green functions of the Hubbard model obtained from quantum Monte Carlo, we find that the holographic model provides a very good fit to the Hubbard Green function. However, the information loss when transposing the holographic Green functions to imaginary frequencies implies that a deeper connection to Hubbard-like models remains questionable.
Cited by 2
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 2 Filip Herček,
- 1 3 Vladan Gecin,
- 1 Mihailo Čubrović
- 1 Институт за физику у Београду / Institute of Physics Belgrade
- 2 Универзитет у Новом Саду / University of Novi Sad
- 3 Универзитет у Београду / University of Belgrade