Tunable electronic properties and enhanced ferromagnetism in Cr2Ge2Te6monolayer by strain engineering

Lifei Liu, Xiaohui Hu*, Yifeng Wang, Arkady V. Krasheninnikov, Zhongfang Chen, Litao Sun

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

Recently, as a new representative of Heisenberg's two-dimensional (2D) ferromagnetic materials, 2D Cr2Ge2Te6 (CGT), has attracted much attention due to its intrinsic ferromagnetism. Unfortunately, the Curie temperature (T C ) of CGT monolayer is only 22 K, which greatly hampers the development of the applications based on the CGT materials. Herein, by means of density functional theory computations, we explored the electronic and magnetic properties of CGT monolayer under the applied strain. It is demonstrated that the band gap of CGT monolayer can be remarkably modulated by applying the tensile strain, which first increases and then decreases with the increase of tensile strain. In addition, the strain can increase the Curie temperature and magnetic moment, and thus largely enhance the ferromagnetism of CGT monolayer. Notably, the obvious enhancement of T C by 191% can be achieved at 10% strain. These results demonstrate that strain engineering can not only tune the electronic properties, but also provide a promising avenue to improve the ferromagnetism of CGT monolayer. The remarkable electronic and magnetic response to biaxial strain can also facilitate the development of CGT-based spin devices.

Original languageEnglish
Article number485408
Number of pages9
JournalNanotechnology
Volume32
Issue number48
DOIs
Publication statusPublished - 26 Nov 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • CrGeTe
  • Curie temperature
  • density functional theory calculations
  • electronic properties
  • magnetic properties
  • strain engineering

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