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Symmetry
Special Issues
Symmetry Considerations for Ferroelectric Materials and Flexoelectricity
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Symmetry Considerations for Ferroelectric Materials and Flexoelectricity

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Chemistry: Symmetry/Asymmetry".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 2910

Special Issue Editor

Dr. Peter V. Yudin

E-Mail Website
Guest Editor
Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech Republic
Interests: ferroelectrics; thin films; nanotechnology; continuum mechanics; flexoelectricity

Special Issue Information

Dear Colleagues,

Ferroelectrics are inseparable from symmetry breaking. In these and other related materials symmetry plays important role for the interpretation of observed phenomena, and enables their use in devices such as memory and reconfigurable electronics.

This Special Issue invites you to submit original research works, review articles, and short communications related to symmetry considerations for ferro-, antiferro-, piezo-, pyro-, and flexo-electricity, as well as other related effects. The impact of material’s symmetry as well as symmetry of defects, boundary conditions and applied stimuli on structure, properties and dynamics are of interest. This special issue aims to promote knowledge exchange for this important scientific direction, building at the intersection of physics, mathematics, and materials science.

The aims and scopes of the Issue include the developments to the continuum theory and phase field modeling. The role of symmetry in kinetics and dynamics of ferroelectrics, Definition/refinement of the thermodynamic potentials from symmetry, ab initio data, and practice are also welcome.

Dr. Peter V. Yudin
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Ferroelectricity
  • Flexoelectricity
  • Polarization
  • Strain
  • Tensor
  • Pyroelectricity
  • Continuum mechanics
  • Boundary conditions
  • Higher order elasticity
  • Electro-mechanical coupling
  • Piezoelectricity
  • Electrostriction
  • Domains
  • Landau theory
  • Phase field

Published Papers (1 paper)

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Research

14 pages, 5542 KiB  
Article
Flexoelectric and Piezoelectric Coupling in a Bended MoS2 Monolayer
by Hanna V. Shevliakova, Semen O. Yesylevskyy, Ihor Kupchak, Galina I. Dovbeshko, Yunseok Kim and Anna N. Morozovska
Symmetry 2021, 13(11), 2086; https://doi.org/10.3390/sym13112086 - 03 Nov 2021
Cited by 4 | Viewed by 2443
Abstract
Low-dimensional (LD) transition metal dichalcogenides (TMDs) in the form of nanoflakes, which consist of one or several layers, are the subject of intensive fundamental and applied research. The tuning of the electronic properties of the LD-TMDs are commonly related with applied strains and [...] Read more.
Low-dimensional (LD) transition metal dichalcogenides (TMDs) in the form of nanoflakes, which consist of one or several layers, are the subject of intensive fundamental and applied research. The tuning of the electronic properties of the LD-TMDs are commonly related with applied strains and strain gradients, which can strongly affect their polar properties via piezoelectric and flexoelectric couplings. Using the density functional theory and phenomenological Landau approach, we studied the bended 2H-MoS2 monolayer and analyzed its flexoelectric and piezoelectric properties. The dependences of the dipole moment, strain, and strain gradient on the coordinate along the layer were calculated. From these dependences, the components of the flexoelectric and piezoelectric tensors have been determined and analyzed. Our results revealed that the contribution of the flexoelectric effect dominates over the piezoelectric effect in both in-plane and out-of-plane directions of the monolayer. In accordance with our calculations, a realistic strain gradient of about 1 nm−1 can induce an order of magnitude higher than the flexoelectric response in comparison with the piezoelectric reaction. The value of the dilatational flexoelectric coefficient is almost two times smaller than the shear component. It appeared that the components of effective flexoelectric and piezoelectric couplings can be described by parabolic dependences of the corrugation. Obtained results are useful for applications of LD-TMDs in strain engineering and flexible electronics. Full article
(This article belongs to the Special Issue Symmetry Considerations for Ferroelectric Materials and Flexoelectricity)
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