Now showing items 1-7 of 7

    • A flexoelectric microelectromechanical system on silicon 

      Bhaskar, Umesh Kumar; Banerjee, Nirupam; Abdollahi Hosnijeh, Amir; Wang, Zhen; Scholm, Darrell G.; Rijnders, Guus; Catalan, Gustau (2016)
      Article
      Open Access
      Flexoelectricity allows a dielectric material to polarize in response to a mechanical bending moment and, conversely, to bend in response to an electric field. Compared with piezoelectricity, flexoelectricity is a weak ...
    • Converse flexoelectricity yields large piezoresponse force microscopy signals in non-piezoelectric materials 

      Abdollahi Hosnijeh, Amir; Domingo, Neus; Arias Vicente, Irene; Catalan, Gustau (2019-03-20)
      Article
      Open Access
      Converse flexoelectricity is a mechanical stress induced by an electric polarization gradient. It can appear in any material, irrespective of symmetry, whenever there is an inhomogeneous electric field distribution. This ...
    • Ferroelectrics as smart mechanical materials 

      Cordero Edwards, Kumara; Domingo Marimon, Neus; Abdollahi Hosnijeh, Amir; Sort Viñas, Jordi; Catalan, Gustau (2017-07-21)
      Article
      Open Access
      The mechanical properties of materials are insensitive to space inversion, even when they are crystallographically asymmetric. In practice, this means that turning a piezoelectric crystal upside down or switching the ...
    • Flexoelectric MEMS: towards an electromechanical strain diode 

      Bhaskar, Umesh Kumar; Banerjee, Nirupam; Abdollahi Hosnijeh, Amir; Solanas, E.; Rijnders, Guus; Catalan, Gustau (2016)
      Article
      Open Access
      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 ...
    • Flexoelectricity in bones 

      Vazquez Sancho, Fabian; Abdollahi Hosnijeh, Amir; Damjanovic, Dragan; Catalan, Gustau (2018-01-18)
      Article
      Open Access
      ones generate electricity under pressure, and this electromechanical behavior is thought to be essential for bone's self-repair and remodeling properties. The origin of this response is attributed to the piezoelectricity ...
    • Fracture toughening and toughness asymmetry induced by flexoelectricity 

      Abdollahi Hosnijeh, Amir; Peco, Christian; Millán, Daniel; Arroyo Balaguer, Marino; Catalan, Gustau; Arias Vicente, Irene (2015-09-08)
      Article
      Restricted access - publisher's policy
      Cracks generate the largest strain gradients that any material can withstand. Flexoelectricity (coupling between strain gradient and polarization) must therefore play an important role in fracture physics. Here we use a ...
    • Piezoelectric mimicry of flexoelectricity 

      Abdollahi Hosnijeh, Amir; Vazquez Sancho, Fabian; Catalan, Gustau (American Institute of Physics (AIP), 2018-11-15)
      Article
      Open Access
      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 ...