POLARIZED X-RAY-ABSORPTION SPECTRA OF TIS2, TISE2, AND TITE2

We studied the anisotropy of the unoccupied electron states of three t itanium dichalcogenides by means of polarized x-ray-absorption spectro scopy. The experimental spectra of TiS2, TiSe2, and TiTe2 at the Ti K edge and of TiTe2 at the Te L-1 edge were compared with the results of real-space multiple-scattering calculations. The local angular moment um projections of the densities of states at the titanium sites are pr esented for energies up to 25 eV above the Fermi level. The Ti K,edge spectra of all three dichalcogenides are quite similar to each other p rovided the differences in their lattice constants are suppressed by c omparing the spectra in equivalent energy scales. However, the corresp ondence between the Te L-1 edge of TiTe2 and the S K edge of TiS2 is m uch less pronounced. For most of the spectra good agreement between ex periment and theory was found. [S0163-1829(98)01336-8].