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51 papers
Imaging the Electric Field with X-Ray Diffraction Microscopy
Trygve Magnus Ræder, Urko Petralanda, Thomas Olsen +1
The properties of semiconductors and functional dielectrics are defined by their response in electric fields, which may be perturbed by defects and the strain they generate. In thi…
Two-dimensional ferroelectrics from high throughput computational screening
Mads Kruse, Urko Petralanda, Morten N. Gjerding +3
We report a high throughput computational search for two-dimensional ferroelectric materials. The starting point is 252 pyroelectric materials from the computational 2D materials d…
Polarization switching induced by domain wall sliding in two-dimensional ferroelectric monochalcogenides
Urko Petralanda, Thomas Olsen
The ability to switch between distinct states of polarization comprises the defining property of ferroelectrics. However, the microscopic mechanism responsible for switching is not…
Plane wave implementation of the magnetic force theorem for magnetic exchange constants: Application to bulk Fe, Co and Ni
Frederik Durhuus, Thorbjørn Skovhus, Thomas Olsen
We present a plane wave implementation of the magnetic force theorem, which provides a first principles framework for extracting exchange constants parameterizing a classical Heise…
Abundance of second order topology in symmetric two-dimensional insulators
Joachim Sødequist, Urko Petralanda, Thomas Olsen
We have screened 71 two-dimensional (2D) materials with symmetry for non-trivial second order topological order and find that 28 compounds exhibit an obstructed atomic limit…
Magnons in antiferromagnetic bcc-Cr and CrO from time-dependent density functional theory
Thorbjørn Skovhus, Thomas Olsen
We apply time-dependent density functional theory to calculate the transverse magnetic susceptibility of bcc-Cr and CrO, which constitute prototypical examples of antiferro…