Due to their outstanding properties and promises for future technology in energy generation, transition metal dichalcogenides (TMDs) have gathered a lot of interest in recent years. Amongst this class of materials TMDs based on molybdenum, tungsten, sulfur and selenium gathered a lot attention because of their semiconducting properties and the possibility to be synthesized by bottom up techniques. Here, using an evaporation of metal-saturated chalcogen melt at 850-655 deg., we were able to obtain, from their solid solutions, a high quality crystals of transition metal diselenide and ditelluride crystals like (PtTe2, PdTe2, NiTe2, TaTe2, TiTe2, RuTe2, PtSe2, PdSe2, NbSe2, TiSe2, VSe2, ReSe2). Additionally, we show the possibility to synthesize crystals of rare-earth metal polychalcogenides and NbS2. Most of the obtained crystals have a layered CdI2 structure. We, further, have investigated the basic physical properties of some selected obtained crystals. These investigations reflect the good quality of the obtained crystals. Remarkably, the charge density wave transition in both 1T-TiSe2 and 2H-NbSe2 crystals shows a clear sign at 200 K and 33 K, respectively. Angle-resolved photoemission spectroscopy and electron diffractions techniques are used to directly access the electronic and crystalline properties of PtTe2 single crystals.
Published in: "arXiv Material Science".