Polarization switching in nanoscale ferroelectric composites containing PVDF polymer film and graphene layers

Abstract

Modeling and computer study of a composite nanostructure containing a ferroelectric PVDF polymer and graphene layers were carried out in this work by molecular dynamic simulation and semiempirical quantum PM3 RHF method using the HyperChem software. It is shown here that the inclusion of graphene layers into the PVDF ferroelectric polymer increases the coercive field and decreases the polarization switching time of this composite structure. It is possible due to decrease in the damping coefficient of the Landau-Khalatnikov kinetic equation of the Landau-Ginzburg-Devonshire theory for two-dimensional ferroelectrics. Heterostructures with adjustable polarization switching times can be constructed based on such approach.

Keywords:

• Nanoscale ferroelectrics
• PVDF film
• graphene
• composite
• polarization switching time
• molecular dynamic simulation

Acknowledgments

The equipment of Ural Center for Shared Use “Modern Nanotechnology” Ural Federal University (Reg. No. 2968) was used.

Additional information

Funding

The work was supported by Russian Foundation for Basic Research, projects 20-51-53014_GFEN_a and 19-01-00519_a. Xiang-Jian Meng expresses his gratitude to the National Natural Science Foundation of China (NNSFC) for the grant No. 61574151 and Hong Shen – for the grant No. 62011530043.