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

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