Mapping experimental electronic transport measurements on appropriate band structure models*

For several years, established guiding principles based on effective masses, carrier density, and constant relaxation time have been heuristically used to interpret trends in the power factor. In spite of many simplifying assumptions, the Sommerfeld model has became a standard for thermoelectricity. To verify and validate this interpretative approach we have developed a software tool that, using experimental electronic transport data, leads to band structure parameters that can then be compared with first principles calculations. We present our software tool by illustrating few specific examples for complex sulfides.