Quantum conductivity fit

Quantum conductivity fit procedure used and described in Pickem et al.'s 'Resistivity saturation in Kondo insulators', Commun. Phys. 4, 226 (2021). The fit allows extracting the size of the gap and the scattering rate from the low-temperature behavior of an experimental conductivity of a semiconductor or insulator.

Script

quantum_conductivity_fit.py is a user script to fit experimental data with the two-level (2L) conductivity equation

with

on a given dataset (here: resistivity.dat)

Fit

Executing this script on the provided data results in the following graphical output

Acknowledgments

This project has been supported by the Austrian Science Fund (FWF) through project LinReTraCe P 30213-N36.