Fig. 3: Unified excitation spectrum of the superconductor Bi-2212.
From: Non-equilibrium anti-Stokes Raman spectroscopy for investigating Higgs modes in superconductors
The NEARS maps of Bi-2212 show the Raman response of the Higgs mode at around 25 meV together with the PB excitation Raman susceptibility around 60 meV in A1g (left) and B1g (right) geometry at a time delay of 3 ps. To create the NEARS maps, the fits from Fig. 2 were interpolated as a function of fluence. Raman energies of the utilized Lorentzians are shown as red and blue data points, respectively. Error bars are the standard uncertainty of the fitted frequency for the Higgs mode and PB peak, respectively. The symmetry of the Higgs modes for the respective pump/probe configuration is indicated at the top left.
