Figure 2
From: A facile approach to calculating superconducting transition temperatures in the bismuth solid phases

The superconducting transition temperature Tc as a function of the electronic N(EF) and vibrational θD (the Debye temperature) parameters for the value of the Cooper pair potential V0 calculated in this work. To be consistent the units for N(EF) are: states eV-1 atom-1. The units for Tc and θD are kelvins.