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Chin. Phys. B, 2020, Vol. 29(8): 086403    DOI: 10.1088/1674-1056/ab9440

Thickness-dependent structural stability and transition in molybdenum disulfide under hydrostatic pressure

Jiansheng Dong(董健生), Gang Ouyang(欧阳钢)
Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Matter Microstructure and Function of Hunan Province, Synergetic Innovation Center for Quantum Effects and Applications(SICQEA), Hunan Normal University, Changsha 410081, China
Abstract  Understanding the physical mechanism of structural stability and transition in various polytypes of layered transition metal dichalcogenides under the external stimulus is of crucial importance for their new applications. Here, we investigate the thickness-dependent structural properties of MoS2 under the condition of hydrostatic pressure in terms of bond relaxation and thermodynamics considerations. For both types of MoS2 structures, we find that the transition and metallization are significantly modulated by hydrostatic pressure and the number of layers. We establish a pressure-size phase diagram to address the transition mechanism. Our study not only provides insights into the thickness-dependent structural properties of MoS2, but also shows a theoretical guidance for the design and fabrication of MoS2-based devices.
Keywords:  bond relaxation      thickness effect      layered transition metal dichalcogenides      structural transition      pressure modulation  
Received:  03 February 2020      Revised:  19 April 2020      Published:  05 August 2020
PACS:  64.70.Nd (Structural transitions in nanoscale materials)  
  61.50.Ks (Crystallographic aspects of phase transformations; pressure effects)  
  64.10.+h (General theory of equations of state and phase equilibria) (Finite-size systems)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 91833302).
Corresponding Authors:  Gang Ouyang     E-mail:

Cite this article: 

Jiansheng Dong(董健生), Gang Ouyang(欧阳钢) Thickness-dependent structural stability and transition in molybdenum disulfide under hydrostatic pressure 2020 Chin. Phys. B 29 086403

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