J. Faul et al., DETERMINATION OF CONDUCTION-BAND STATES IN GAAS(110), INP(110), AND INAS(110), Physical review. B, Condensed matter, 47(19), 1993, pp. 12625-12635
Angle-resolved constant-initial-state spectroscopy (ARCIS) from the va
lence-band maximum as initial state was used to determine conduction-b
and energies at the GAMMA point for GaAs, InP, and InAs. With the help
of nonlocal empirical-pseudopotential (EPM) calculations structure in
the ARCIS spectra up to 20 eV could be assigned to particular interba
nd transitions. A group of transitions around 26 eV is derived from th
e pseudopotential split (220)-umklapp process at the Brillouin-zone ce
nter. Above 30 eV there appears to be no correspondence between conduc
tion-band states as calculated in the EPM framework and structure in t
he spectra. Autoionizing resonances due to surface core excitons have
been observed. From their energies surface-core-exciton binding energi
es in the range 0.5-1.5 eV have been determined for the three compound
s.