10 citations · 19 across the 8 of their papers we have counts for
8 papers
Finite-momentum dielectric function and excitonic effects from time-dependent density-functional theory with dielectrically screened hybrid functionals
Didarul Alam, Jiuyu Sun, Carsten A. Ullrich
This paper studies the performance of time-dependent density-functional theory (TDDFT) for calculating the dielectric function of semiconductors and insulators at finite momentum t…
Stability of the long-range corrected exchange-correlation functional and the Proca procedural functional in time-dependent density-functional theory
Jared R. Williams, Carsten A. Ullrich
Excitonic effects in the optical absorption spectra of solids can be described with time-dependent density-functional theory (TDDFT) in the linear-response regime, using a simple c…
Spin waves with source-free time-dependent spin density functional theory
Jenna L. Bologa, Carsten A. Ullrich
Time-dependent spin density functional theory (TD-SDFT) allows the theoretical description of spin and magnetization dynamics in electronic systems from first quantum mechanical pr…
Emergent topological quasiparticle kinetics in constricted nanomagnets
J. Guo, D. Hill, V. Lauter +4
The ubiquitous domain wall kinetics under magnetic field or current application describes the dynamic properties in nanostructured magnets. However, when the geometrical size of a…
Self-interaction correction schemes for non-collinear spin-density-functional theory
Nicolas Tancogne-Dejean, Martin Lüders, Carsten A. Ullrich
We extend some of the well established self-interaction correction (SIC) schemes of density-functional theory to the case of systems with noncollinear magnetism. Our proposed SIC s…
Persistent dynamic magnetic state in artificial honeycomb spin ice
Jiasen Guo, Pousali Ghosh, Daniel Hill +5
Topological magnetic charges, arising due to the non-vanishing magnetic flux on spin ice vertices, serve as the origin of magnetic monopoles that traverse the underlying lattice ef…
Response properties of III-V dilute magnetic semiconductors: interplay of disorder, dynamical electron-electron interactions and band-structure effects
F. V. Kyrychenko, C. A. Ullrich
A theory of the electronic response in spin and charge disordered media is developed with the particular aim to describe III-V dilute magnetic semiconductors like GaMnAs. The theor…
Temperature-dependent resistivity of ferromagnetic GaMnAs: Interplay between impurity scattering and many-body effects
F. V. Kyrychenko, C. A. Ullrich
The static conductivity of the dilute magnetic semiconductor GaMnAs is calculated using the memory function formalism and time-dependent density-functional theory to account for im…