Journal
JOURNAL OF APPLIED PHYSICS
Volume 127, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5139007
Keywords
-
Categories
Funding
- National Natural Science Foundation of China (NNSFC) [11602074]
- Natural Scientific Research Innovation Foundation in Harbin Institute of Technology [HIT.NSRIF.2020058]
- Harbin Institute of Technology (Shenzhen Graduate School) through the Scientific Research Starting Project for New Faculty
Ask authors/readers for more resources
In this paper, molecular dynamics (MD) simulations and thermodynamics analyses are performed to investigate the electrocaloric (EC) effect in monolayer germanium sulfide (GeS). Our MD simulations show a large EC effect in the armchair direction of monolayer GeS at room temperature, since monolayer GeS only has polarization in the armchair direction due to its anisotropic structure. Moreover, an enhancement in the EC effect is observed in monolayer GeS by increasing the ambient temperature. A thermodynamic model is proposed to explain this impact of temperature on the EC effect, which originates from the thermally enhanced thermal expansion property of monolayer GeS. Moreover, the thermodynamic model incorporated with the material parameters extracted from MD simulations is able to predict the EC coefficient. The predicted value is found to be identical to the value obtained from MD simulations, which further proves the EC effect observed in monolayer GeS. The observation of the EC effect in monolayer GeS (a typical two-dimensional material) is expected to open a new direction in searching EC materials and, meanwhile, provide opportunities for the innovative design of novel solid-state nanoscale cooling devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available