Experimental Evidence of a Stable 2H Phase on the Surface of Layered 1T?-TaTe2

We report on the low-energy electronic structure of tantalum ditelluride (1T?-TaTe2), one charge density wave (CDW) materials from group V transition metal dichalcogenides using angle-resolved photoemission spectroscopy and functional theory (DFT). find that Fermi surface topology TaTe2 is quite complicated compared to its isovalent compounds such as TaS2, TaSe2, isostructural compound NbTe2. Most importantly, we discover 1T?-TaTe2 has more resemblance 2H-TaTe2, while bulk hypothetical 1T-TaTe2. These experimental observations are thoroughly with our DFT calculations performed 1T-, 2H-, 2H (monolayer)/1T-TaTe2. further notice temperature independent up 180 K, confirming phase stable K CDW order not due nesting.