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Momentum-dependent scaling exponents of nodal self-energies measured in strange metal cuprates and modelled using semi-holography

Author

Listed:
  • S. Smit

    (University of Amsterdam)

  • E. Mauri

    (Utrecht University)

  • L. Bawden

    (University of Amsterdam)

  • F. Heringa

    (University of Amsterdam)

  • F. Gerritsen

    (University of Amsterdam)

  • E. Heumen

    (University of Amsterdam)

  • Y. K. Huang

    (University of Amsterdam)

  • T. Kondo

    (University of Tokyo)

  • T. Takeuchi

    (Toyota Technological Institute 2-12-1 Hisakata Tempaku-ku)

  • N. E. Hussey

    (Radboud University
    University of Bristol)

  • M. Allan

    (Leiden University)

  • T. K. Kim

    (Diamond Light Source)

  • C. Cacho

    (Diamond Light Source)

  • A. Krikun

    (KTH Royal Institute of Technology and Stockholm University)

  • K. Schalm

    (Leiden University)

  • H.T.C. Stoof

    (Utrecht University)

  • M. S. Golden

    (University of Amsterdam
    Dutch Institute for Emergent Phenomena (DIEP))

Abstract

The anomalous strange metal phase found in high-Tc cuprates does not follow the conventional condensed-matter principles enshrined in the Fermi liquid and presents a great challenge for theory. Highly precise experimental determination of the electronic self-energy can provide a test bed for theoretical models of strange metals, and angle-resolved photoemission can provide this as a function of frequency, momentum, temperature and doping. Here we show that constant energy cuts through the nodal spectral function in (Pb,Bi)2Sr2−xLaxCuO6+δ have a non-Lorentzian lineshape, consistent with a self-energy that is k dependent. This provides a new test for aspiring theories. Here we show that the experimental data are captured remarkably well by a power law with a k-dependent scaling exponent smoothly evolving with doping, a description that emerges naturally from anti-de Sitter/conformal-field-theory based semi-holography. This puts a spotlight on holographic methods for the quantitative modelling of strongly interacting quantum materials like the cuprate strange metals.

Suggested Citation

  • S. Smit & E. Mauri & L. Bawden & F. Heringa & F. Gerritsen & E. Heumen & Y. K. Huang & T. Kondo & T. Takeuchi & N. E. Hussey & M. Allan & T. K. Kim & C. Cacho & A. Krikun & K. Schalm & H.T.C. Stoof & , 2024. "Momentum-dependent scaling exponents of nodal self-energies measured in strange metal cuprates and modelled using semi-holography," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48594-6
    DOI: 10.1038/s41467-024-48594-6
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