Publications by Guido Gerra | EPFL Graph Search

Related publications (8)

CdTe surfaces: Characterizing dynamical processes with first-principles metadynamics

Wanda Andreoni, Fabio Pietrucci, Guido Gerra

We study dynamical processes at CdTe surfaces using ab initio metadynamics simulations. The c(2X2) to (2X1) transition of the Te-terminated (001) surface is found to involve a "c(2X2) + (2X1)" intermediate, consistent with experiment, and crossing of simil ...

AIP American Institute of Physics2010

Ionic polarizability of conductive metal oxides and critical thickness for ferroelectricity in BaTiO3

Nava Setter, Alexander Tagantsev, Guido Gerra

We report a first-principles investigation of ultrathin BaTiO3 films with SrRuO3 electrodes. We find that the ionic relaxations in the metal-oxide electrode play a crucial role in stabilizing the ferroelectric phase. Comparison with frozen-phonon calculati ...

2006

Surface-stimulated phenomena in the polarization response of ferroelectrics

Guido Gerra

The integration of ferroelectrics in electronic devices requires that they be used in the form of thin films, which implies that for such systems finite-size effects related to the presence of a ferroelectric-electrode interface become important. In this t ...

EPFL2008

Surface-stimulated nucleation of reverse domains in ferroelectrics

Nava Setter, Alexander Tagantsev, Guido Gerra

We present a model for reverse domain nucleation in ferroelectrics, which takes into account ferroelectric-electrode coupling in both homogeneous and random cases. The model provides a solution to the coercivity paradox-i.e., the large discrepancy between ...

2005

Erratum: Ferroelectricity in asymmetric metal-ferroelectric-metal heterostructures: A combined first-principles-phenomenological approach (vol 98, art no 207601, 2007)

Nava Setter, Alexander Tagantsev, Guido Gerra

2007

Interface-induced phenomena in polarization response of ferroelectric thin films

Alexander Tagantsev, Guido Gerra

2006

Short-range and long-range contributions to the size effect in metal-ferroelectric-metal heterostructures

Nava Setter, Alexander Tagantsev, Guido Gerra

2008

Ferroelectricity in asymmetric metal-ferroelectric-metal heterostructures: A combined first-principles-phenomenological approach

Nava Setter, Alexander Tagantsev, Guido Gerra

2007