Zobrazeno 1 - 10
of 174
pro vyhledávání: '"Byczuk, K."'
Autor:
Weh, A., Zhang, Y., Östlin, A., Terletska, H., Bauernfeind, D., Tam, K. -M., Evertz, H. G., Byczuk, K., Vollhardt, D., Chioncel, L.
Publikováno v:
Phys. Rev. B 104, 045127 (2021)
To explore correlated electrons in the presence of local and non-local disorder, the Blackman-Esterling-Berk method for averaging over off-diagonal disorder is implemented into dynamical mean-field theory using tensor notation. The impurity model com
Externí odkaz:
http://arxiv.org/abs/2105.06971
Autor:
Östlin, A., Zhang, Y., Terletska, H., Beiuseanu, F., Popescu, V., Byczuk, K., Vitos, L., Jarrell, M., Vollhardt, D., Chioncel, L.
Publikováno v:
Phys. Rev. B 101, 014210 (2020)
By merging single-site typical medium theory with density functional theory we introduce a self-consistent framework for electronic structure calculations of materials with substitutional disorder which takes into account Anderson localization. The s
Externí odkaz:
http://arxiv.org/abs/1911.02393
Publikováno v:
Phys. Rev. B 100, 115118 (2019)
We study Friedel oscillations and screening effects of the impurity potential in the Hubbard model. Electronic correlations are accounted for by solving the real-space dynamical mean-field theory equations using the continuous time quantum Monte-Carl
Externí odkaz:
http://arxiv.org/abs/1807.08566
Publikováno v:
Eur. Phys. J. B 92, 23 (2019)
We formulate real-space dynamical mean-field theory within scattering theory. Thereby the Friedel sum rule is derived for interacting lattice fermions at zero temperature.
Comment: 7 pages, no figures, extended and corrected version
Comment: 7 pages, no figures, extended and corrected version
Externí odkaz:
http://arxiv.org/abs/1807.08559
Publikováno v:
J. Phys. Commun. 2, 025031 (2018)
The magnetic phases induced by the interplay between disorder acting only on particles with a given spin projection ("spin-dependent disorder") and a local repulsive interaction is explored. To this end the magnetic ground state phase diagram of the
Externí odkaz:
http://arxiv.org/abs/1607.07708
Publikováno v:
Phys. Rev. B 92, 094202 (2015)
The interplay between local, repulsive interactions and disorder acting only on one spin orientation of lattice fermions ("spin-dependent disorder") is investigated. The nonmagnetic disorder vs. interaction phase diagram is computed using Dynamical M
Externí odkaz:
http://arxiv.org/abs/1507.08944
Publikováno v:
New J. Phys. 15, 045031 (2013)
Motivated by the rapidly growing possibilities for experiments with ultracold atoms in optical lattices we investigate the thermodynamic properties of correlated lattice fermions in the presence of an external spin-dependent random potential. The cor
Externí odkaz:
http://arxiv.org/abs/1302.3395
Publikováno v:
Phys. Rev. Lett. 108, 087004 (2012); Phys. Rev. Lett. 108, 189902 (2012)
We introduce a well-defined and unbiased measure of the strength of correlations in quantum many-particle systems which is based on the relative von Neumann entropy computed from the density operator of correlated and uncorrelated states. The usefuln
Externí odkaz:
http://arxiv.org/abs/1110.3214
The dynamical mean-field theory (DMFT) is a widely applicable approximation scheme for the investigation of correlated quantum many-particle systems on a lattice, e.g., electrons in solids and cold atoms in optical lattices. In particular, the combin
Externí odkaz:
http://arxiv.org/abs/1109.4833
Publikováno v:
Phys. Rev. B 82, 235115 (2010)
Strongly correlated fermions in three- and two-dimensional optical lattices with experimentally realistic speckle disorder are investigated. We extend and apply the statistical dynamical mean-field theory, which treats local correlations non-perturba
Externí odkaz:
http://arxiv.org/abs/1009.3438