119 citations · 616 across the 22 of their papers we have counts for
22 papers
Ultrafast electron crystallography reveals the atomic pathway of a light-driven correlated insulator-to-metal transition
Arthur Niedermayr, Hongyi Xu, Chin Shen Ong +9
Ultrafast phase transitions in correlated materials are often inferred from selected diffraction peak intensities or diffraction peak displacements, leaving the underlying three-di…
Exciton-induced magnons carrying orbital angular momentum in CrI3
Martin Pavelka, Vishal Shokeen, Ruslan Chulkov +15
Magnons are collective spin excitations that contain and transport spin angular momentum in magnetic materials. It has been suggested that they can also carry orbital angular momen…
Femtosecond charge and spin dynamics in CoPt alloys
Martin Pavelka, Simon Marotzke, Ru-Pan Wang +19
The use of advanced X-ray sources plays a key role in the study of dynamic processes in magnetically ordered materials. The progress in X-ray free electron lasers enables the direc…
Non-equilibrium THz-phonon spin coupling in CrI3
V Shokeen, M Pavelka, R Chulkov +8
Manipulating magnetism at the THz timescale in atomically thin ferromagnets by exploiting the interactions of spins with optical phonon modes presents an innovative idea for THz sp…
Element-specific ultrafast lattice dynamics in FePt nanoparticles
Diego Turenne, Igor Vaskivskiy, Klaus Sokolowski-Tinten +14
Light-matter interaction at the nanoscale in magnetic alloys and heterostructures is a topic of intense research in view of potential applications in high-density magnetic recordin…
Optically controlling the competition between spin flips and intersite spin transfer in a Heusler half-metal on sub-100 fs timescales
Sinéad A. Ryan, Peter C. Johnsen, Mohamed F. Elhanoty +10
The direct manipulation of spins via light may provide a path toward ultrafast energy-efficient devices. However, distinguishing the microscopic processes that can occur during ult…
The interplay of local electron correlations and ultrafast spin dynamics in fcc Ni
Tobias Lojewski, Mohamed F. Elhanoty, Loïc Le Guyader +48
The complex electronic structure of metallic ferromagnets is determined by a balance between exchange interaction, electron hopping leading to band formation, and local Coulomb rep…
Ultrafast manipulation of the NiO antiferromagnetic order via sub-gap optical excitation
Xiaocui Wang, Robin Y. Engel, Igor Vaskivskyi +19
Wide-band-gap insulators such as NiO offer the exciting prospect of coherently manipulating electronic correlations with strong optical fields. Contrary to metals where rapid depha…
Element selective ultrafast magnetization dynamics of hybrid Stoner-Heisenberg magnets
Mohamed F. Elhanoty, Olle Eriksson, Ronny Knut +2
Stoner and Heisenberg excitations in magnetic materials are inherently different. The former involves an effective reduction of the exchange splitting, whereas the latter comprises…
Orientation before destruction. A multiscale molecular dynamics study
Anna Sinelnikova, Thomas Mandl, Harald Agélli +4
The emergence of ultra-fast X-ray free-electron lasers opens the possibility of imaging single molecules in the gas phase at atomic resolution. The main disadvantage of this imagin…
Tailoring the opto-electronic response of graphene nanoflakes by size and shape optimization
Raquel Esteban-Puyuelo, Rajat Kumar Sonkar, Bhalchandra Pujari +2
The long spin-diffusion length, spin-lifetimes and excellent optical absorption coefficient of graphene provide an excellent platform for building opto-electronic devices as well a…
Correlation effects and orbital magnetism of Co clusters
L. Peters. I. Di Marco, O. Grånäs, E. Şaşıoğlu +7
Recent experiments on isolated Co clusters have shown huge orbital magnetic moments in comparison with their bulk and surface counterparts. These clusters hence provide the unique…
Electronic and Magnetic Properties of single Fe atoms on a CuN Surface; Effects of Electron Correlations
S. K. Panda, I. Di Marco, O. Grånäs +2
The electronic structure and magnetic properties of a single Fe adatom on a CuN surface have been studied using density functional theory in the local spin density approximation (L…
Analytic continuation by averaging Padé approximants
J. Schött, I. L. M. Locht, E. Lundin +3
The ill-posed analytic continuation problem for Green's functions and self-energies is investigated by revisiting the Padé approximants technique. We propose to remedy the well-kno…
Non-trivial order parameter in SrIrO
Shreemoyee Ganguly, Oscar Granas, Lars Nordstrom
Electronic structure calculations obtained with an approach with density functional theory with an enhanced local Coulomb interaction, DFT+, are presented for the relativistic m…
Electronic structure, cohesive properties and magnetism of SrRuO; a theoretical investigation
Oscar Grånäs, Igor di Marco, Olle Eriksson +2
We have performed an extensive test of the ability of density functional theory within several approximations for the exchange-correlation functional, local density approximation+H…
A new first principles approach to calculate phonon spectra of disordered alloys
Oscar Grånäs, Biswanath Dutta, Subhradip Ghosh +1
The lattice dynamics in substitutional disordered alloys with constituents having large size differences is driven by strong disorder in masses, inter-atomic force constants and lo…
On the large magnetic anisotropy of Fe_{2}P
Marcio Costa, Oscar Grånäs, Anders Bergman +4
We present an investigation on the large magnetic anisotropy of Fe_{2}P, based on {\it Ab Initio} density-functional theory calculations, with a full potential linear muffin-tin or…
Charge self-consistent dynamical mean-field theory based on the full-potential linear muffin-tin orbital method: methodology and applications
O. Grånäs, I. Di Marco, P. Thunström +4
Full charge self-consistence (CSC) over the electron density has been implemented into the local density approximation plus dynamical mean-field theory (LDA+DMFT) scheme based on a…
A route towards finding large magnetic anisotropy in nano-composites: application to a WRe/Fe multilayer
Sumanta Bhandary, Oscar Grånäs, Laszlo Szunyogh +3
We suggest here a novel nano-laminate, 5[Fe]/2[WRe] (x=0.6-0.8), with enhanced magnetic hardness in combination with a large saturation moment. The calculated magnetic…
Itinerant magnetic multipole moments of rank five, triakontadipoles, as the hidden order in URuSi
Francesco Crichhio, fredrik Bultmark, Oscar Granas +1
A broken symmetry ground state without any magnetic moments has been calculated by means of local-density-approximation to density functional theory plus a local exchange term, the…
Multipole decomposition of LDA+ energy and its application to actinides compounds
Fredrik Bultmark, Francesco Cricchio, Oscar Grånäs +1
A general reformulation of the exchange energy of -shell is applied in the analysis of the magnetic structure of various actinides compounds in the framework of LDA+U method. T…