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$_{8+δ}$

Abstract

The application of global non-analytical fit to the quantitative spectral analysis of the bilayer-split peak-dip-hump lineshape of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ at $(π,0)$ are revisited. The robustness of the results is verified by various fitting schemes confirming physically the correlation of the superconducting peak with the superfluid density.

6.8 iopart pages, 2 figures