Relazione su invito

Interplay between Ferroelectricity and spin-orbit coupling.

Picozzi S.
  Venerdì 15/09   09:00 - 12:00   Aula A224   II - Fisica della materia
The discovery of novel properties, effects or microscopic mechanisms in modern materials science is often driven by the quest for the coexistence and/or coupling of several functional properties into a single compound. Within this framework, by exploiting the interplay between spin and dipolar degrees of freedom via spin-orbit coupling in ferroelectric semiconductors, I will focus on the tight link between $k-dependent$ spin-splitting in the electronic structure, spin-texture and electric polarization. Based on density functional simulations, I will show our theoretical predictions of a giant Rashba spin-splitting in bulk GeTe, prototype of novel multifunctional materials --- labeled as Ferro-Electric Rashba Semi-Conductors (FERSC) --- where the chirality of the spin texture is one-to-one linked to polarization. As the latter can be induced/controlled/switched via an electric field in a non-volatile way, the integration of semiconductor spintronics with ferroelectricity is envisaged.