D. Chandramohan, S. Balasubramanian
Jun 1, 1990
Zeitschrift für Physik B Condensed Matter
The nonlinear Thomas-Fermi-Dirac equation is solved by a variational method for the positive and negative point charges in silicon, germanium and diamond. With the parameters determined, approximate analytic form is presented for the spatial dielectric function. Comparison with numerical result is indicated.