Abstract
We systematically examined the properties of the polycrystalline 1T-TiSe2±α series synthesized by solid-state method, combined chemical analysis and physical property characterization, including Energy-dispersive X-ray spectroscopy (EDXS), x-ray photoelectron spectroscopy (XPS) x-ray diffraction (XRD), resistivity, hall effect and magnetization measurement have been employed to study how Ti/Se ratio influences the charge density wave (CDW) formation, the crystal structure, and the electrical characteristics. The electrical resistivity of Se-rich -TiSe2 (Ti/Se = 0.484) is found to be a metallic behavior with decreased CDW transition temperature. This study emphasizes how sensitive 1T-TiSe2 characteristics are to defects and stoichiometry.
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