Density of states for cleaved Si (111) fromL1L2,3VandL2,3VVAuger spectra

The $L_1{L}_{2,3}V$ and $L_{2,3}\mathrm{VV}$ Auger spectra obtained from vacuum-cleaved Si (111) surfaces have been debroadened and deconvoluted to obtain the occupied (surface) density of states (DOS) functions. Good agreement with theory is found for both transitions. In particular, the surface dangling bond state has been determined from Auger data for the first time. While the $L_1{L}_{2,3}V$ derived curve approximates closely to the DOS, the $L_{2,3}\mathrm{VV}$ derived one shows suppression of the $s^{*}s$ and $s^{*}p$ peaks, and can be interpreted only in terms of a partial DOS.