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- W4308805539 abstract "The discovery and control of new phases of matter are a central endeavor in materials research. Phase transition in two-dimensional (2D) materials has been achieved through laser irradiation, strain engineering, electrostatic doping, and controlled chemical vapor deposition growth, and laser irradiation is considered as a fast and clean technique for triggering phase transition. By using first-principles calculations, we predict that the monolayer MoTe2 exhibits a photo-induced phase transition (PIPT) from the semiconducting 2H phase to the topological 1T′ phase. The purely electronic excitations by photon soften multiple lattice vibrational modes and lead to structural symmetry breaking within sub-picosecond timescales, which is shorter than the timescale of a thermally driven phase transition, enabling a controllable phase transition by means of photons. This finding provides deep insight into the underlying physics of the phase transition in 2D transition-metal ditellurides and show an ultrafast phase-transition mechanism for manipulation of the topological properties of 2D systems. More importantly, our finding opens a new avenue to discover the new families of PIPT materials that are very limited at present but are essential to design the next generation of devices operated at ultrafast speed." @default.
- W4308805539 created "2022-11-15" @default.
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- W4308805539 date "2022-12-21" @default.
- W4308805539 modified "2023-09-26" @default.
- W4308805539 title "Photo-Induced Displacive Phase Transition in Two-dimensional MoTe<sub>2</sub> from First-Principle Calculations" @default.
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- W4308805539 doi "https://doi.org/10.5772/intechopen.108460" @default.
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