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Articles, 4 records found

Articles	4 records found

5 p, 445.5 KB

Piezoelectric Mimicry of Flexoelectricity / Abdollahi, Amir (Universitat Politècnica de Catalunya) ; Vásquez Sancho, Fabián (Institut Català de Nanociència i Nanotecnologia) ; Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia)
The origin of "giant" flexoelectricity, orders of magnitude larger than theoretically predicted, yet frequently observed, is under intense scrutiny. There is mounting evidence correlating giant flexoelectriclike effects with parasitic piezoelectricity, but it is not clear how piezoelectricity (polarization generated by strain) manages to imitate flexoelectricity (polarization generated by strain gradient) in typical beam-bending experiments, since in a bent beam the net strain is zero. [...]
2018 - DOI (Digital Object Identifier)

10.1103/PhysRevLett.121.205502
Physical review letters, Vol. 121, Issue 20 (November 2018) , art. 205502

Detailed record -

17 p, 1.1 MB

Flexoelectricity in antiferroelectrics / Vales Castro, Pablo (Institut Català de Nanociència i Nanotecnologia) ; Roleder, Krystian (University of Silesia in Katowice. Institute of Physics) ; Zhao, Lei (Tsinghua University) ; Li, Jing-Feng (Tsinghua University) ; Kajewski, Dariusz (University of Silesia in Katowice. Institute of Physics) ; Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia)
Flexoelectricity (coupling between polarization and strain gradients) is a property of all dielectric materials that has been theoretically known for decades, but only relatively recently it has begun to attract experimental attention. [...]
2018 - DOI (Digital Object Identifier)

10.1063/1.5044724
Applied physics letters, Vol. 113, Issue 13 (September 2018) , art. 132903

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$Flexoelectric fracture-ratchet effect in ferroelectrics$

16 p, 968.3 KB

Flexoelectric fracture-ratchet effect in ferroelectrics / Cordero Edwards, Rohini Kumara (Institut Català de Nanociència i Nanotecnologia) ; Kianirad, Hoda (Kungliga Tekniska högskolan. Institutionen för Tillämpad fysik) ; Canalias, Carlot (Kungliga Tekniska högskolan. Institutionen för Tillämpad fysik) ; Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia)
The propagation front of a crack generates large strain gradients and it is therefore a strong source of gradient-induced polarization (flexoelectricity). Herein, we demonstrate that, in piezoelectric materials, a consequence of flexoelectricity is that crack propagation is helped or hindered depending on whether it is parallel or antiparallel to the piezoelectric polar axis. [...]
2019 - DOI (Digital Object Identifier)

10.1103/PhysRevLett.122.135502
Physical review letters, Vol. 122, issue 13 (April 2019) , p. 135502

Detailed record -

7 p, 2.4 MB

Flexoelectric MEMS : Towards an electromechanical strain diode / Bhaskar, Umesh K. (Institut Català de Nanociència i Nanotecnologia) ; Banerjee, N. (University of Twente) ; Abdollahi, Amir (Institut Català de Nanociència i Nanotecnologia) ; Solanas, E. (Lyncée Tec SA) ; Rijnders, G. (University of Twente) ; Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia)
Piezoelectricity and flexoelectricity are two independent but not incompatible forms of electromechanical response exhibited by nanoscale ferroelectrics. Here, we show that flexoelectricity can either enhance or suppress the piezoelectric response of the cantilever depending on the ferroelectric polarity and lead to a diode-like asymmetric (two-state) electromechanical response.
2016 - DOI (Digital Object Identifier)

10.1039/c5nr06514c
Nanoscale, Vol. 8, Issue 3 (January 2016) , p. 1293-1298

Detailed record -

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