Geometrically polarized architected dielectrics with apparent piezoelectricity

Fabrication of 3d Micro-architected/ Nano-architected Materials

'Architected' Cloud Solutions Revealed

“It's getting harder to focus on the vision of cloud computing these days. While there are still plenty of critical and complex problems to solve, and many, many implications of this disruptive operations model that have yet to be understood, the truth is that we've entered a new phase in the evolution of cloud adoption. Real work now exceeds theory when it comes to both new online content and ...

Resilient 3D hierarchical architected metamaterials.

Hierarchically designed structures with architectural features that span across multiple length scales are found in numerous hard biomaterials, like bone, wood, and glass sponge skeletons, as well as manmade structures, like the Eiffel Tower. It has been hypothesized that their mechanical robustness and damage tolerance stem from sophisticated ordering within the constituents, but the specific ...

Geometric Currents in Piezoelectricity

As a simple model for piezoelectricity we consider a gas of infinitely many non-interacting electrons subject to a slowly timedependent periodic potential. We show that in the adiabatic limit the macroscopic current is determined by the geometry of the Bloch bundle. As a consequence we obtain the King-Smith and Vanderbilt formula up to errors smaller than any power of the adiabatic parameter. v...

Critical piezoelectricity in percolation

2014 We study the behaviour of piezoelectricity in highly heterogeneous media. The piezoelectric effect introduces a coupling between electrical and mechanical properties, which have separately different scaling behaviours. Its study therefore constitutes a priori an interesting question. This problem is also suggested by the recent development of low-density, porous piezoelectric ceramics whic...