Research Progress on Epitaxial Growth and Engineering of Two-Dimensional Topological Quantum Materials Based on Interfacial Effect
Monolayer transition metal dichalcogenides with 1T'structural phase is an important class of two-dimensional topological quantum materials,which show great application potentials in the fields of topological quantum computing and spintronics.However,for the most of the transition metal dichalcogenides,their 1T'phase is not the thermally stable one,making it very difficult to obtain monolayer samples with 1T'phase.The interfacial effect on the thermal stability of 1T'phase during the epitaxial growth was investigated by taking 1T'-WSe2 as a representation.Based on this research,the epitaxial growth of single-phase 1T'-WSe2 monolayer was realized with the assistance of enhanced interfacial interactions.This method can be further applied to the epitaxial growth of single-phase 1T'-WS2 monolayer.This method and the 1T'phase monolayer transition metal dichalcogenides would provide material basis for the further research on the fundamental physical properties of two-dimensional topological quantum materials,fabrication of heterostructures and novel quantum states based on them,and the topological quantum computing based on two-dimensional topological quantum materials.
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