Before revision: Here, zS is the universal constant (called here the Sommerfeld supply density): and is the Fermi–Dirac distribution function: where T is thermodynamic temperature and kB is Boltzmann's constant.
After revision: Here, zS is the universal constant (called here the Sommerfeld supply density): and is the Fermi–Dirac distribution function: where T is thermodynamic temperature and kB is the Boltzmann constant.