PHOTOEMISSION-STUDY OF THE ELECTRONIC-STRUCTURES OF AUAL2 AND AUIN2

Synchroton-radiation-excited angle-integrated photoemission spectra of AuAl2 and AuIn2 are presented. The spacings of the three An 5d bands of AuIn2 were determined and were interpreted to yield the crystal-fie ld and the spin-orbit parameters of 0.95 +/- 0.05 and 0.52 +/- 0.05 eV ,respectively. The binding energies at the Gamma points for AuAl2 and AuIn2 agree with those obtained from the band structure calculation an d the angle-resolved photoemission spectroscopic study to within 8%. T he Au 5d charges deplete more for AuAl2 than for AuIn2. (C) 1998 Elsev ier-Science Ltd. All rights reserved.