Zobrazeno 1 - 10
of 329
pro vyhledávání: '"A A Katanin"'
Autor:
Adler, S., Fus, D. R., Malcolms, M. O., Vock, A., Held, K., Katanin, A. A., Schäfer, T., Toschi, A.
We investigate the magnetic quantum phase-transitions in bulk correlated metals at the level of dynamical mean-field theory. To this end, we focus on the Hubbard model on a simple cubic lattice as a function of temperature and electronic density, det
Externí odkaz:
http://arxiv.org/abs/2409.04308
Autor:
Goremykin, I. A., Katanin, A. A.
Publikováno v:
Phys. Rev. B 110, 085153 (2024)
We reconsider the derivation of Ward identities for spin stiffnesses, which determine the non-linear sigma model of magnetic degrees of freedom of interacting electrons in the presence of antiferromagnetic or incommensurate correlations. We emphasize
Externí odkaz:
http://arxiv.org/abs/2405.04277
Autor:
Mazitov, T. B., Katanin, A. A.
Publikováno v:
Phys. Rev. B 110, 075160 (2024)
We study formation and screening of local magnetic moments in the two-band Hubbard model in the presence of Hund exchange interaction using dynamic mean field theory approach. The characteristic temperatures of the formation, beginning and full scree
Externí odkaz:
http://arxiv.org/abs/2403.20036
Publikováno v:
2D Mater. 11, 025001 (2024)
Monolayer Fe$_2$C is expected to possess strong electronic correlations, which can significantly contribute to electronic and magnetic properties. In this work we consider electronic and magnetic properties of MXene Fe$_2$C within the DFT+DMFT approa
Externí odkaz:
http://arxiv.org/abs/2312.03551
Autor:
Protsenko, V. S., Katanin, A. A.
Publikováno v:
Phys. Rev. B 108, 245117 (2023)
We study the effect of various configurations of vacancies on the magnetic properties of graphene nanoflake (GNF) with screened realistic long-range electron interaction [T. O. Wehling, et. al., Phys. Rev. Lett. 106, 236805 (2011)] within the functio
Externí odkaz:
http://arxiv.org/abs/2305.11085
Autor:
Goremykin, I. A., Katanin, A. A.
Publikováno v:
Phys. Rev. B 107, 245104 (2023)
We develop a dynamical mean-field theory approach for the spiral magnetic order, changing to a local coordinate frame with preferable spin alignment along the $z$-axis, which can be considered with the impurity solvers treating the spin diagonal loca
Externí odkaz:
http://arxiv.org/abs/2212.14656
Autor:
Igoshev, P. A., Katanin, A. A.
Publikováno v:
Phys. Rev. B 107, 115105 (2023)
We investigate the possibility of ferromagnetic ordering in the non-degenerate Hubbard model on the face-centered cubic lattice within the functional renormalization group technique using temperature as a scale parameter. We assume the relations betw
Externí odkaz:
http://arxiv.org/abs/2212.04135
Autor:
Mazitov, T. B., Katanin, A. A.
Publikováno v:
Phys. Rev. B 106, 205148 (2022)
We study the effect of the formation and screening of local magnetic moments on the temperature- and interaction dependencies of spectral functions and resistivity in the vicinity of the metal-insulator transition. We use the dynamical mean-field the
Externí odkaz:
http://arxiv.org/abs/2207.14065
Publikováno v:
Phys. Rev. B 107, 035116, (2023)
We study electron correlations and their impact on magnetic properties of bcc vanadium by a combination of density functional and dynamical mean-field theory. The calculated uniform magnetic susceptibility {in bcc structure} is of Pauli type at low t
Externí odkaz:
http://arxiv.org/abs/2206.12383
Publikováno v:
Phys. Rev. Materials 6, 055004 (2022)
We consider electronic correlation effects and their impact on magnetic properties of tetragonally distorted chemically ordered FeCo alloys (L1$_0$ structure) being a promising candidate for rare-earth-free permanent magnets. We employ a state-of-the
Externí odkaz:
http://arxiv.org/abs/2202.03205