skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Flexocoupling impact on size effects of piezoresponse and conductance in mixed-type ferroelectric semiconductors under applied pressure

Journal Article · · Physical Review. B
 [1];  [1];  [2];  [3];  [4];  [5];  [6];  [1]; ORCiD logo [5]
  1. National Academy of Sciences of Ukraine, Kyiv (Ukraine)
  2. Technical Univ. of Darmstadt (Germany)
  3. National Academy of Sciences of Ukraine, Kyiv (Ukraine); Technical Univ. of Darmstadt (Germany)
  4. National Research University of Electronic Technology “MIET”, Moscow (Russia)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Sungkyunkwan Univ., Suwon (Republic of Korea)

Here, we explore the role of flexoelectric effect in functional properties of nanoscale ferroelectric films with mixed electronic-ionic conductivity. Using a coupled Ginzburg-Landau model, we calculate spontaneous polarization, effective piezoresponse, elastic strain and compliance, carrier concentration, and piezoconductance as a function of thickness and applied pressure. In the absence of flexoelectric coupling, the studied physical quantities manifest well-explored size-induced phase transitions, including transition to paraelectric phase below critical thickness. Similarly, in the absence of external pressure flexoelectric coupling affects properties of these films only weakly. However, the combined effect of flexoelectric coupling and external pressure induces polarizations at the film surfaces, which cause the electric built-in field that destroys the thickness-induced phase transition to paraelectric phase and induces the electretlike state with irreversible spontaneous polarization below critical thickness. Interestingly, the built-in field leads to noticeable increase of the average strain and elastic compliance in this thickness range. We further illustrate that the changes of the electron concentration by several orders of magnitude under positive or negative pressures can lead to the occurrence of high- or low-conductivity states, i.e., the nonvolatile piezoresistive switching, in which the swing can be controlled by the film thickness and flexoelectric coupling. The obtained theoretical results can be of fundamental interest for ferroic systems, and can provide a theoretical model for explanation of a set of recent experimental results on resistive switching and transient polar states in these systems.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725; GE 1171/7-1
OSTI ID:
1870214
Alternate ID(s):
OSTI ID: 1330736
Journal Information:
Physical Review. B, Vol. 94, Issue 17; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

References (57)

Space- and Time-Resolved Mapping of Ionic Dynamic and Electroresistive Phenomena in Lateral Devices journal July 2013
Applications of Modern Ferroelectrics journal February 2007
Equilibrium and stability of polarization in ultrathin ferroelectric films with ionic surface compensation journal August 2011
Focusing light on flexoelectricity journal August 2015
Room temperature surface piezoelectricity in SrTiO3 ceramics via piezoresponse force microscopy journal December 2008
Surface effects on phase transitions in ferroelectrics and dipolar magnets journal August 1979
Domains in Ferroic Crystals and Thin Films book January 2010
Ferroelectric thin film properties—Depolarization field and renormalization of a “bulk” free energy coefficients journal January 2003
The effects of polarization dynamics and domain switching energies on field induced phase transformations of perovskite ferroelectrics journal October 2011
Elastic effects of vacancies in strontium titanate: Short- and long-range strain fields, elastic dipole tensors, and chemical strain journal August 2009
Transport and Deformation-Potential Theory for Many-Valley Semiconductors with Anisotropic Scattering journal February 1956
Local probing of ionic diffusion by electrochemical strain microscopy: Spatial resolution and signal formation mechanisms journal September 2010
Properties of a solid state device with mobile dopants: Analytic analysis for the thin film device journal October 2008
Conduction at domain walls in oxide multiferroics journal January 2009
Breaking of macroscopic centric symmetry in paraelectric phases of ferroelectric materials and implications for flexoelectricity journal November 2014
Physics and Applications of Bismuth Ferrite journal June 2009
Correlative Multimodal Probing of Ionically-Mediated Electromechanical Phenomena in Simple Oxides journal October 2013
Bioelectromechanical imaging by scanning probe microscopy: Galvani's experiment at the nanoscale journal March 2006
Nonlinear space charge dynamics in mixed ionic-electronic conductors: Resistive switching and ferroelectric-like hysteresis of electromechanical response journal August 2014
Understanding the origins of the intrinsic dead layer effect in nanocapacitors journal March 2009
Interface Effect on Ferroelectricity at the Nanoscale journal March 2006
Probing Local Ionic Dynamics in Functional Oxides at the Nanoscale journal July 2013
The effect of flexoelectricity on the dielectric properties of inhomogeneously strained ferroelectric thin films journal March 2004
Revival of the magnetoelectric effect journal April 2005
Head-to-head and tail-to-tail 180 ° domain walls in an isolated ferroelectric journal May 2011
Defect thermodynamics and kinetics in thin strained ferroelectric films: The interplay of possible mechanisms journal February 2014
Ferroelectric thin films phase diagrams with self-polarized phase and electret state journal June 2006
Phase diagrams and physical properties of single-domain epitaxial Pb ( Zr 1 x Ti x ) O 3 thin films journal February 2003
Nanoscale mapping of ion diffusion in a lithium-ion battery cathode journal August 2010
MATERIALS SCIENCE: The Renaissance of Magnetoelectric Multiferroics journal July 2005
The missing memristor found journal May 2008
Functional Ion Defects in Transition Metal Oxides journal August 2013
Nanoscale electromechanics of paraelectric materials with mobile charges: Size effects and nonlinearity of electromechanical response of SrTiO 3 films journal July 2011
Thermodynamics of electromechanically coupled mixed ionic-electronic conductors: Deformation potential, Vegard strains, and flexoelectric effect journal May 2011
Misfit strain driven cation inter-diffusion across an epitaxial multiferroic thin film interface journal February 2014
Giant Electric-Field-Induced Strain in PVDF-Based Battery Separator Membranes Probed by Electrochemical Strain Microscopy journal May 2016
Spatial resolution, information limit, and contrast transfer in piezoresponse force microscopy journal June 2006
Mechanical Control of Electroresistive Switching journal August 2013
Electrical Modulation of the Local Conduction at Oxide Tubular Interfaces journal September 2013
Intercalation-Induced Stress and Heat Generation within Single Lithium-Ion Battery Cathode Particles journal January 2008
Spontaneous flexoelectric/flexomagnetic effect in nanoferroics journal April 2009
Resistive switching in transition metal oxides journal June 2008
Ferroelectric thin films: Review of materials, properties, and applications journal September 2006
Electrochemical strain microscopy time spectroscopy: Model and experiment on LiMn 2 O 4 journal August 2015
Fundamentals of flexoelectricity in solids journal October 2013
Evidence for possible flexoelectricity in tobacco mosaic viruses used as nanotemplates journal April 2006
Predicted Magnetoelectric Effect in Fe / BaTiO 3 Multilayers: Ferroelectric Control of Magnetism journal July 2006
Beyond Condensed Matter Physics on the Nanoscale: The Role of Ionic and Electrochemical Phenomena in the Physical Functionalities of Oxide Materials journal November 2012
Thermodynamic theory of the lead zirconate-titanate solid solution system, part III: Curie constant and sixth-order polarization interaction dielectric stiffness coefficients journal November 1989
Electric field-induced tetragonal to orthorhombic phase transitions in [110] c -oriented BaTiO 3 single crystals journal December 2012
Unit-cell scale mapping of ferroelectricity and tetragonality in epitaxial ultrathin ferroelectric films journal December 2006
Finite size and intrinsic field effect on the polar-active properties of ferroelectric-semiconductor heterostructures journal May 2010
Deformation potential constants of biaxially tensile stressed Ge epitaxial films on Si ( 100 ) journal October 2004
The internal electric field originating from the mismatch effect and its influence on ferroelectric thin film properties journal May 2004
Equilibrium Polarization of Ultrathin PbTiO 3 with Surface Compensation Controlled by Oxygen Partial Pressure journal October 2011
Nanoscale electromechanical properties of CaCu 3 Ti 4 O 12 ceramics journal September 2011
Electromechanical probing of ionic currents in energy storage materials journal May 2010

Cited By (8)

Labyrinthine domains in ferroelectric nanoparticles: a manifestation of gradient-driven morphological transition text January 2018
Surface-screening mechanisms in ferroelectric thin films and their effect on polarization dynamics and domain structures journal January 2018
Mixed electrochemical–ferroelectric states in nanoscale ferroelectrics journal May 2017
Analytical description of the size effect on pyroelectric and electrocaloric properties of ferroelectric nanoparticles text January 2019
Configurable topological textures in strain graded ferroelectric nanoplates journal January 2018
Enhanced energy harvesting of cantilevered flexoelectric micro-beam by proof mass journal November 2019
Defect driven flexo-chemical coupling in thin ferroelectric films text January 2017
Hierarchy of Domain Reconstruction Processes due to Charged Defect Migration in Acceptor Doped Ferroelectrics preprint January 2019