X-Ray Spectroscopic Investigation of the Valence-Band Structure of Layered Compounds MPS_3 ( M = Mn, Fe, Ni, Zn, Mg)

抄録

The P Kβ emission and S Kβ emission spectra influorescence from the layered compounds MPS_3 (M = Mn, Fe, Ni, Zn, Mg)have been measured with a high-resolution two-crystal vacuumspectrometer equipped with Ge(111) crystals. The measured emissionspectra are mainly determined by the [P_2S_6]^4- cluster. TheP Kβ emissionand S Kβ emission spectra of ZnPS_3, NiPS_3 and FePS_3are compared with available XPS valence-bandspectra and theoretical band structures on a common energyscale and their valence-band structuresare investigated. It is shown that the P 3p and S 3pstates in their valencebands lie very close to each other and the respective 3p statesare alike in the MPS_3 compounds.