Epitaxial growth of monolayer PdTe₂ and patterned PtTe₂ by direct tellurization of Pd and Pt surfaces

Two-dimensional (2D) palladium ditelluride (PdTe2) and platinum (PtTe2) are two Dirac semimetals which demonstrate fascinating quantum properties such as superconductivity, magnetism topological order, illustrating promising applications in future nanoelectronics optoelectronics. However, the synthesis of their monolayers is dramatically hindered by strong interlayer coupling orbital hybridization. In this study, an efficient method for monolayer PdTe2 PtTe2 demonstrated. Taking advantages surface reaction, epitaxial growth large-area high quality patterned achieved direct tellurization Pd(111) Pt(111). A well-ordered pattern with Kagome lattice formed Te vacancy arrays successfully grown. Moreover, multilayer can be also obtained potential excitation plasmons observed. The simple reliable procedure gives unprecedented opportunities investigating new phenomena facilitating practical