Van der Waals direction transformation induced by shear strain in layered PdSe2

Peng Lv, Gang Tang, Yanyu Liu, Yingzhuo Lun, Xueyun Wang, Jiawang Hong*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Uniaxial and biaxial strain approaches are usually implemented to switch the ferroelastic states, which play a key role in the application of the ferroics and shape memory materials. In this work, by using the first-principles calculations, we found not only uniaxial strain, but also shear strain can induce a novel ferroelastic switching, in which the van der Waals (vdW) layered direction rotates with the ferroelastic transition in layered bulk PdSe2. This is an interesting phenomenon that has never been discovered. The novel three-state ferroelastic switching in layered PdSe2 also occurs under shear strain. Our result shows that the shear strain could be used as an effective approach for manipulating the functionalities of layered materials in potential device applications.

Original languageEnglish
Article number101231
JournalExtreme Mechanics Letters
Volume44
DOIs
Publication statusPublished - Apr 2021

Keywords

  • 2D materials
  • Ferroelastic
  • First-principles method
  • Shear strain

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