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

Photoemission "experiments" on holographic lattices

“…On the qualitative, phenomenological side, our findings seem robust and in line with the general knowledge on strange metals [33,49,52]. The million dollar question is -is holography ready to answer specific condensed matter questions, i.e.…”

“…For mass runs needed for the comparison to the Hubbard model, we have also used approximate methods: averaged equations (multipole expansion) and semiholography (in the narrow sense, introduced in [19] and exploited e.g. in [52]) to gain a first guess at the solution; afterwards we have always confirmed the result through a full lattice calculation. The next two sections are devoted mainly to the full lattice calculation of the spectrum from the probe Dirac equation.…”

Strange metal electrodynamics across the phase diagram of Bi2−xPbxSr2−yLaHeumen1, Feng2, Cassanelli3 et al. 2022Phys. Rev. B13050View full textAdd to dashboardCite

“…We find that the observed phase angle is set by the conformal tail exponent and the ratio of the spectral weights D Dr and D inc . Based on our analysis, we find that the exponent at optimal doping is close to α ≈ 0.5, which is similar to the power law exponents observed in the self-energy of angle resolved photoemission experiments [55,56]. Also the doping dependence agrees well with the observed dependence in these experiments.…”

Strange metal dynamics across the phase diagram of Bi$_{2}$Sr$_{2}$CuO$_{6+δ}$ cuprates

“…We find that the observed phase angle is set by the conformal tail exponent and the ratio of the spectral weights D Dr and D inc . Based on our analysis, we find that the exponent at optimal doping is close to α ≈ 0.5, which is similar to the power law exponents observed in the self energy of angle resolved photoemission experiments [52,53]. Also the doping dependence agrees well with the observed dependence in these experiments.…”