60 citations · 291 across the 21 of their papers we have counts for
9 papers · 1 filter
Exact long-range dielectric screening and interatomic force constants in quasi-2D crystals
Miquel Royo, Massimiliano Stengel
We develop a fundamental theory of the long-range electrostatic interactions in two-dimensional crystals by performing a rigorous study of the nonanalyticities of the Coulomb kerne…
Controlling ferroelectric hysteresis offsets in PbTiO based superlattices
Simon Divilov, Hsiang-Chun Hsing, Mohammed Humed Yusuf +9
Ferroelectric materials are characterized by degenerate ground states with multiple polarization directions. In a ferroelectric capacitor this should manifest as equally favourable…
Direct and converse flexoelectricity in two-dimensional materials
Matteo Springolo, Miquel Royo, Massimiliano Stengel
Building on recent developments in electronic-structure methods, we define and calculate the flexoelectric response of two-dimensional (2D) materials fully from first principles. I…
Switching a polar metal via strain gradients
Asier Zabalo, Massimiliano Stengel
Although rare, spontaneous breakdown of inversion symmetry sometimes occurs in a material which is metallic: these are commonly known as polar metals or ferroelectric metals. Their…
Ferroelectric 180 degree walls are mechanically softer than the domains they separate
Christina Stefani, Louis Ponet, Konstantin Shapovalov +7
Domain walls are functionally different from the domains they separate, but little is known about their mechanical properties. Using scanning probe microscopy, we have measured the…
Using high multipolar orders to reconstruct the sound velocity in piezoelectrics from lattice dynamics
Miquel Royo, Konstanze R. Hahn, Massimiliano Stengel
Information over the phonon band structure is crucial to predicting many thermodynamic properties of materials, such as thermal transport coefficients. Highly accurate phonon dispe…