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Reversible Phase Transition Enables Rapid Electrical Switching in Multilayer MoTe_{2} under Cyclic Strain
Bolin Yang1, Zhilong Peng1, Cun Zhang2
1Beijing Institute of Technology, School of Aerospace Engineering, Beijing 100081, China.
Physical Review Letters
|August 18, 2025
Summary
Molybdenum ditelluride (MoTe2) shows strain-induced conductivity changes due to a reversible phase transition. This discovery aids in developing advanced nanoelectronic devices and improving manufacturing processes.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Molybdenum ditelluride (MoTe2) is a key material for flexible electronics and straintronics.
- The mechanisms behind its rapid strain-induced conductivity changes are not well understood.
Purpose of the Study:
- To elucidate the fundamental mechanisms governing strain-induced conductivity changes in MoTe2.
- To provide insights for optimizing MoTe2-based nanoelectronic devices.
Main Methods:
- Deep-learning molecular dynamics simulations.
- Density-functional theory calculations.
Main Results:
- Identified a reversible phase transition between the semiconductive T_{b}^{'} phase and the semimetallic T^{*} phase.
- The phase transition is highly sensitive to the direction of applied strain.
Conclusions:
- The T_{b}^{'} to T^{*} phase transition is the primary driver of conductivity changes in MoTe2 under strain.
- Findings offer guidance for designing high-frequency nanoelectronic devices and reducing fabrication issues.
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