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5 papers · 2 filters
Omnidirectional refractive devices for flexural waves based on graded phononic crystals
Daniel Torrent, Yan Pennec, Bahram Djafari-Rouhani
Different omnidirectional refractive devices for flexural waves in thin plates are proposed and numerically analyzed. Their realization is explained by means phononic crystal plate…
Effective Medium Theory for Elastic Metamaterials in Thin Elastic Plates
Daniel Torrent, Yan Pennec, Bahram Djafari-Rouhani
An effective medium theory for resonant and non-resonant metamaterials for flexural waves in thin plates is presented. The theory provides closed-form expressions for the effective…
Epitaxial hexagonal boron nitride on Ir(111): A work function template
Fabian Schulz, Robert Drost, Sampsa K. Hämäläinen +3
Hexagonal boron nitride (h-BN) is a prominent member in the growing family of two-dimensional materials with potential applications ranging from being an atomically smooth support…
Polarization vortex domains induced by switching electric field in ferroelectric films with circular electrodes
Laurent Baudry, Anaïs Sené, Igor A. Luk'yanchuk +2
We describe ferroelectric thin films with circular electrodes and develop a thermodynamic theory that explains previously mysterious experiments. It is found to be especially usefu…
Dynamics of Field Induced Polarization Reversal in Strained Perovskite Ferroelectric Films with c-oriented Polarization
Laurent Baudry, Igor A. Luk'yanchuk, Anna Razumnaya
The field-induced polarization reversal in -oriented ferroelectric phase of strained perovskite film has been studied. We show that in additional to the conventional longitudina…