Zobrazeno 1 - 10
of 126
pro vyhledávání: '"Hergert, Wolfram"'
Publikováno v:
Physical Review B 107, L020406 (2023)
High intensity THz lasers allow for the coherent excitation of individual phonon modes. The ultrafast control of emergent magnetism by means of phonons opens up new tuning mechanisms for functional materials. While theoretically predicted phonon magn
Externí odkaz:
http://arxiv.org/abs/2208.05746
Autor:
Ariskina, Regina, Schnedler, Michael, Esquinazi, Pablo D., Champi, Ana, Stiller, Markus, Hergert, Wolfram, Dunin-Borkowski, R. E., Ebert, Philipp, Venus, Tom, Estrela-Lopis, Irina
Publikováno v:
Phys. Rev. Materials 5, 044601 (2021)
Tunneling atomic force microscopy (TUNA) was used at ambient conditions to measure the current-voltage ($I$-$V$) characteristics at clean surfaces of highly oriented graphite samples with Bernal and rhombohedral stacking orders. The characteristic cu
Externí odkaz:
http://arxiv.org/abs/2104.02142
Here we present a novel approach to control magnetic interactions in atomic-scale nanowires. Our ab initio calculations demonstrate the possibility to tune magnetic properties of Fe nanowires formed on vicinal Cu surfaces. Both intrawire and interwir
Externí odkaz:
http://arxiv.org/abs/1812.01683
Autor:
Hamed, Hichem Ben, Hoffmann, Martin, Adeagbo, Waheed A., Ernst, Arthur, Hergert, Wolfram, Hynninen, Teemu, Kokko, Kalevi, Paturi, Petriina
Publikováno v:
Phys. Rev. B 99, 144428 (2019)
We studied for the first time the magnetic phase diagram of the rare-earth manganites series Gd$_{1-x}$Ca$_{x}$MnO$_{3}$ (GCMO) over the full concentration range based on density functional theory. GCMO has been shown to form solid solutions. We take
Externí odkaz:
http://arxiv.org/abs/1810.08501
Autor:
Adeagbo, Waheed A., Hoffmann, Martin, Ernst, Arthur, Hergert, Wolfram, Saloaro, Minnamari, Paturi, Petriina, Kokko, Kalevi
Publikováno v:
Phys. Rev. Materials 2, 083604 (2018)
Since oxide materials like Sr$_2$FeMoO$_6$ are usually applied as thin films, we studied the effect of biaxial strain, resulting from the substrate, on the electronic and magnetic properties and, in particular, on the formation energy of point defect
Externí odkaz:
http://arxiv.org/abs/1805.02969
Autor:
Hoffmann, Martin, Marmodoro, Alberto, Ernst, Arthur, Hergert, Wolfram, Dahl, Johnny, Lång, Jouko, Laukkanen, Pekka, Punkkinen, Marko P. J., Kokko, Kalevi
We investigate the effect of short-range order (SRO) on the electronic structure in alloys from the theoretical point of view using density of states (DOS) data. In particular, the interaction between the atoms at different lattice sites is affected
Externí odkaz:
http://arxiv.org/abs/1604.07238
Autor:
Geilhufe, Matthias, Nayak, Sanjeev K., Thomas, Stefan, Däne, Markus, Tripathi, Gouri S., Entel, Peter, Hergert, Wolfram, Ernst, Arthur
Publikováno v:
Phys. Rev. B 92, 235203 (2015)
The electronic structure of Pb$_{1-x}$Sn$_{x}$Te is studied by using the relativistic Korringa-Kohn-Rostoker Green function method in the framework of density functional theory. For all concentrations $x$, Pb$_{1-x}$Sn$_{x}$Te is a direct semiconduct
Externí odkaz:
http://arxiv.org/abs/1508.04113
Autor:
Geilhufe, Matthias, Achilles, Steven, Köbis, Markus Arthur, Arnold, Martin, Mertig, Ingrid, Hergert, Wolfram, Ernst, Arthur
Publikováno v:
J. Phys.: Condens. Matter 27 435202, 2017
For a reliable fully-relativistic Korringa-Kohn-Rostoker Green function method, an accurate solution of the underlying single-site scattering problem is necessary. We present an extensive discussion on numerical solutions of the related differential
Externí odkaz:
http://arxiv.org/abs/1506.07743
Autor:
Hoffmann, Martin, Antonov, Victor N., Bekenov, Lev V., Kokko, Kalevi, Hergert, Wolfram, Ernst, Arthur
Oxygen vacancies can be of utmost importance for improving or deteriorating physical properties of oxide materials. Here, we studied from first-principles the electronic and magnetic properties of oxygen vacancies in the double perovskite Sr$_2$FeMoO
Externí odkaz:
http://arxiv.org/abs/1504.02629