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

DOI: 10.1038/s41467-024-48594-6 DOI Help

Authors: 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. Van Heumen (University of Amsterdam) , Y. K. Huang (University of Amsterdam) , T. Kondo (University of Tokyo) , T. Takeuchi (Toyota Technological Institute) , 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))
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nature Communications , VOL 15

State: Published (Approved)
Published: May 2024
Diamond Proposal Number(s): 19403 , 22464

Open Access Open Access

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.

Subject Areas: Materials, Physics

Instruments: I05-ARPES

Added On: 03/06/2024 09:30


Discipline Tags:

Superconductors Quantum Materials Hard condensed matter - electronic properties Physics Materials Science

Technical Tags:

Spectroscopy Angle Resolved Photoemission Spectroscopy (ARPES)