Thermionic current densities from first principles

Johannes Voss, Aleksandra Vojvodic, Sharon H. Chou, Roger T. Howe, Igor Bargatin, Frank Abild-Pedersen
Year of publication: 
The Journal of Chemical Physics

We present a density functional theory-based method for calculating thermionic emission currents from a cathode into vacuum using a non-equilibrium Green's function approach. It does not require semi-classical approximations or crude simplifications of the electronic ...