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Sökning: WFRF:(Schalm S)

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  • Smit, S., et al. (författare)
  • Momentum-dependent scaling exponents of nodal self-energies measured in strange metal cuprates and modelled using semi-holography
  • 2024
  • Ingår i: Nature Communications. - : Nature Research. - 2041-1723. ; 15:1
  • Tidskriftsartikel (refereegranskat)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.
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  • Westin, Johan, 1965, et al. (författare)
  • Impact of hepatic steatosis on viral kinetics and treatment outcome during antiviral treatment of chronic HCV infection
  • 2007
  • Ingår i: J Viral Hepat. - : Wiley. - 1352-0504. ; 14:1, s. 29-35
  • Tidskriftsartikel (refereegranskat)abstract
    • Liver steatosis is highly prevalent in chronic hepatitis C virus (HCV) infection, especially in patients infected with genotype 3 virus, but its significance for the outcome of antiviral treatment is not fully understood. We have monitored steatosis in liver biopsies from 231 patients with chronic HCV infection who received pegylated recombinant interferon-alpha and ribavirin in a phase III study (DITTO trial). The degree of steatosis, along with relevant metabolic parameters, was correlated with the early disappearance of virus and with the final outcome of treatment. Our data suggest that the presence of steatosis impairs the early reduction of viral load during treatment in patients infected with HCV genotype 3 and non-3. Steatosis negatively affected the final outcome of treatment mainly in patients infected with HCV genotype non-3 virus. Based on these findings, we propose that interventions aiming at reducing hepatic steatosis prior to the onset of antiviral therapy may be of benefit to patients infected with HCV of the non-3 genotypes. Patients infected with genotype 3, on the other hand, should be offered early antiviral treatment.
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  • Resultat 1-4 av 4

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