M. Dahneprietsch et al., LOW-DENSITY OF STATES AT THE EPITAXIAL CAF2-SI(111) INTERFACE, Journal of physics. D, Applied physics, 30(12), 1997, pp. 48-50
The density of interface states at the epitaxial CaF2-Si(111) interfac
e grown under UHV conditions at 700 degrees C is found to be much lowe
r than assumed previously, as revealed from photoelectron spectroscopy
. An upper limit is estimated to be 3 x 10(12) cm(-2) eV(-1) near midg
ap, which comes close to values obtained for SiO2-Si interfaces.