Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Sekania, M."'
Compton scattering is a well-established technique that can provide detailed information about electronic states in solids. Making use of the principle of tomography, it is possible to determine the Fermi surface from sets of Compton-scattering data
Externí odkaz:
http://arxiv.org/abs/2210.07701
Publikováno v:
Phys. Rev. B 104, 224421 (2021)
Local excitations as carriers of quantum information spread out in the system in ways governed by the underlying interaction and symmetry. Understanding this phenomenon, also called quantum scrambling, is a prerequisite for employing interacting syst
Externí odkaz:
http://arxiv.org/abs/2112.10710
Publikováno v:
Phys. Rev. B 103, 115144 (2021)
We calculated the magnetic Compton profiles (MCPs) of Ni using density functional theory supplemented by electronic correlations treated within dynamical mean-field theory (DMFT). We present comparisons between the theoretical and experimental MCPs.
Externí odkaz:
http://arxiv.org/abs/2012.08812
Autor:
Appelt, W. H., Östlin, A., Di Marco, I., Leonov, I., Sekania, M., Vollhardt, D., Chioncel, L.
Publikováno v:
Phys. Rev. B 101, 075120 (2020)
We compute the phonon dispersion, density of states, and the Gr\"uneisen parameters of bulk palladium in the combined density functional theory (DFT) and dynamical mean-field theory (DMFT). We find good agreement with experimental results for ground
Externí odkaz:
http://arxiv.org/abs/1812.01507
Publikováno v:
Phys. Rev. B 94, 064423 (2016)
Quantum dynamics of magnetic order in a chiral multiferroic chain is studied. We consider two different scenarios: Ultrashort terahertz (THz) excitations or a sudden electric field quench. Performing analytical and numerical exact diagonalization cal
Externí odkaz:
http://arxiv.org/abs/1608.00030
Autor:
Östlin, A., Appelt, W. H., Di Marco, I., Sun, W., Radonjic, M., Sekania, M., Vitos, L., Tjernberg, O., Chioncel, L.
Publikováno v:
Phys. Rev. B 93, 155152 (2016)
Including on-site electronic interactions described by the multi-orbital Hubbard model we study the correlation effects in the electronic structure of bulk palladium. We use a combined density functional and dynamical mean field theory, LDA+DMFT, bas
Externí odkaz:
http://arxiv.org/abs/1603.00693
Publikováno v:
Physica A: 489, 18-27 (2018), Available online 29 July 2017
The contribution of the valence electrons to the Compton profiles of the alkali metals is calculated using density functional theory. We show that the Compton profiles can be modeled by a $q-$Gaussian distribution, which is characterized by an anisot
Externí odkaz:
http://arxiv.org/abs/1602.01855
Publikováno v:
J. Phys.: Condens. Matter 15 5895-5907 (2003)
We investigate the ground-state phase diagram of the one-dimensional "ionic" Hubbard model with an alternating periodic potential at half-filling by numerical diagonalization of finite systems with the Lanczos and density matrix renormalization group
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304697
Publikováno v:
Eur. Phys. J. B 31, 11-16 (2003)
In order to clarify the physics of the crossover from a Peierls band insulator to a correlated Mott-Hubbard insulator, we analyze ground-state and spectral properties of the one-dimensional half-filled Holstein-Hubbard model using quasi-exact numeric
Externí odkaz:
http://arxiv.org/abs/cond-mat/0203616
We investigate the ground state phase diagram of the one-dimensional ionic Hubbard model with an alternating potential at half-filling by the bosonization technique as well as by numerical diagonalization of finite systems with the Lanczos and DMRG m
Externí odkaz:
http://arxiv.org/abs/cond-mat/0106007