Electronic structure of VxTi1−xSe2 in wide concentration region (0.06 ≤ x ≤ 0.9)

Abstract

An experimental study of the electronic structure of VTiSe system in a wide range of vanadium concentrations (x = 0.06-0.9) using x-ray photoelectron spectroscopy and resonant photoelectron spectroscopy has been performed. The partial charge transfer from the VSe to TiSe structural fragments is experimentally observed, and the most part of the charge is localized on the vanadium atoms in the VSe structural fragments.

Electronic Structures of the Vanadium-Intercalated and Substitutionally Doped Transition-Metal Dichalcogenides TixVySe2

“…At a high concentration of substitutional V, an energy shift of 0.2 eV of the spectra toward low binding energies is observed, which also coincides with the previous results. 9 At the same time, the spectra for the materials with intercalated V are slightly shifted toward high binding energies.…”

“…Most of the spectra have the same shape and energy position and are in agreement with our previous results. 9 The only spectrum whose shape differs from the others is the one for V 0.08 TiSe 2 . It appears to have a shoulder on the higher-binding-energy side.…”

“…It was confirmed that a weak interaction between the TiSe 2 and VSe 2 structural fragments occurs in the case of substitution even at high V concentration, as has been proposed in our previous work. 9 In the case of intercalation, charge transfer between the Ti and V atoms is observed experimentally. The VB spectra at the Ti 2p-3d and V 2p-3d resonant excitation modes show spatial distribution of the 3d electrons of Ti and V.…”

“…The physical properties and crystal structure of TiSe 2 , intercalated with V, have been studied previously. The compounds with substitution of Ti by V are more widely studied: the physical properties , and crystal , and electronic structures of these compounds have already been studied. The starting materials TiSe 2 and VSe 2 have been studied for a long time. − A comparative analysis of the electronic structures of the compositions with substitution and intercalation has not been performed yet.…”

“…The intercalation of V (V x TiSe 2 ) was performed for the first time. The substitution of Ti by V (V x Ti 1– x Se 2 ) was performed previously; in this work, we compare those data with the new ones obtained with better quality. The electronic structures of these materials were studied using the X-ray photoelectron spectroscopy (XPS), resonant photoelectron spectroscopy (ResPES) and X-ray absorption spectroscopy (XAS).…”