Robustness of the global non-analytical fit to the analysis of peak-dip-hump lineshape in bilayer-split spectra of Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$

摘要

The application of global non-analytical fit to the quantitative spectralanalysis of the bilayer-split peak-dip-hump lineshape ofBi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ at $(\pi,0)$ are revisited. The robustnessof the results is verified by various fitting schemes confirming physically thecorrelation of the superconducting peak with the superfluid density.