Here you find a description of the available fit-models in SpectraFox for non-linear curve fitting. You can always add multiple models to fit several spectral features, and couple the parameters in between the models.

• Gaussian peak
• Lorentzian peak
• Fermi-Dirac distribution

• Fano function
• Frota function and numeric derivative

• Polynomial function
• Exponential function

The following fit functions are suited for scanning tunneling spectroscopy. They calculate the current between tip and sample, and are able to return the differential conductance. These fit-models require more calculation time, which is why their parameter space has to be configured accurately.

• BCS-model for conventional superconductors

• spin-flip spectroscopy