NMR relaxation rate in superconducting pnictides: extended $s_{\pm}$ scenario (2008)
Parker, D., Dolgov, O. V., Korshunov, M. M., Golubov, A. A., Mazin, I. I.
Recently, several measurements of the nuclear spin lattice relaxation rate $T_{1}^{-1}$ in the newly discovered superconducting Fe-pnictides have been reported. These measurements generally show no...
Doping evolution of itinerant magnetic excitations in Fe-based oxypnictides (2008)
Employing the four-band tight-binding model we study theoretically the doping dependence of the spin response in the normal state of novel Fe-based pnictide superconductors. We show that the...
Commensurate Spin Density Wave in LaOFeAs: A Local Probe Study (2008)
Luetkens, H., Klingeler, R., Hess, C., Litterst, F. J., Kraken, M., ...
We present a detailed study on the magnetic order in the undoped mother compound LaOFeAs of the recently discovered Fe-based superconductor LaO$_{1-x}$F$_x$FeAs. In particular, we present local probe...
Theory for magnetic excitations in novel superconductors with Fe-based layered structure (2008)
Based on the effective four-band model we analyze the spin response in the normal and superconducting state of the novel Fe-pnictide superconductors. While the normal state spin excitations are...
Electron-phonon interaction in the lamellar cobaltate Na$_x$CoO$_2$ (2008)
Donkov, A., Korshunov, M. M., Eremin, I., Lemmens, P., Gnezdilov, V., Chou, F. C., ...
We study theoretically and experimentally the dependence of the electron-phonon interaction in Na$_x$CoO$_2$ on the sodium concentration $x$. For the two oxygen phonon modes found in Raman...
Electron-phonon interaction in the lamellar cobaltate NaxCoO2 (2008)
Donkov, A., Korshunov, M.M., Eremin, I., Lemmens, P., Gnezdolov, V., Chou, F.C., ...
Parker, D., Dolgov, O.V., Korshunov, M.M., Golubov, A.A., Mazin, I.I.
Recently, several measurements of the nuclear spin-lattice relaxation rate T1-1 in the superconducting Fe pnictides have been reported. These measurements generally show no coherence peak below Tc...
We systematically analyze the influence of the superconducting gap symmetry and the electronic structure on the dynamical spin susceptibility in superconducting Na_xCoO_2$\cdot y$H_2O within a three...
Role of electronic correlations in the Fermi surface formation of Na$_x$CoO$_2$ (2007)
Shorikov, A. O., Korshunov, M. M., Anisimov, V. I.
Band structure of metallic sodium cobaltate Na$_x$CO$_2$ ($x$=0.33, 0.48, 0.61 0.72) has been investigated by local density approximation+Hubbard $U$ (LDA+$U$) method and within Gutzwiller...
Korshunov, M. M., Gavrichkov, V. A., Ovchinnikov, S. G., Nekrasov, I. A., Kokorina, E. E., Pchelkina, Z. V.
In the present work we report the band structure calculations for the high temperature superconductor Nd$_{2-x}$Ce$_x$CuO$_4$ in the regime of strong electronic correlations within an LDA+GTB method,...
Itinerant in-plane magnetic fluctuations and many-body correlations in Na$_x$CoO$_2$ (2007)
Korshunov, M. M., Eremin, I., Shorikov, A., Anisimov, V. I., Renner, M., Brenig, W.
Based on the {\it ab-initio} band structure for Na$_x$CoO$_2$ we derive the single-electron energies and the effective tight-binding description for the $t_{2g}$ bands using projection procedure. Due...
Itinerant in-plane magnetic fluctuations and many-body correlations in NaxCoO2 (2007)
Korshunov, M.M., Eremin, I., Shorikov, A., Anisimov, V.I., Renner, M., Brenig, W.
Korshunov, M.M., Gavrichkov, V.A., Ovchinnikov, S.G., Nekrasov, I.A., Kokorina, E.E., Pchelkina, Z.V.
Korshunov, M. M., Ovchinnikov, S. G.
In this paper a mean-field theory for the spin-liquid paramagnetic non-superconducting phase of the p- and n-type High-$T_c$ cuprates is developed. This theory applied to the effective $t-t'-t''-J^*$...
Electronic theory for itinerant in-plane magnetic fluctuations in Na$_x$CoO$_2$ (2006)
Korshunov, M. M., Eremin, I., Shorikov, A., Anisimov, V. I.
Starting from {\it ab-initio} band structure for Na$_x$CoO$_2$, we derive the single-electron energies and the effective tight-binding description for the $t_{2g}$ bands using a projection procedure....
Gavrichkov, V. A., Korshunov, M. M., Ovchinnikov, S. G., Nekrasov, I. A., Pchelkina, Z. V., Anisimov, V. I.
A novel hybrid scheme is proposed. The {\it ab initio} LDA calculation is used to construct the Wannier functions and obtain single electron and Coulomb parameters of the multiband Hubbard-type...
Korshunov, M. M., Ovchinnikov, S. G., Sherman, A. V.
In the framework of the effective low-energy model for High-$T_c$ cuprates with account for three-centers interaction terms and spin fluctuations the properties of normal and superconducting phases...
Generalization of Luttinger's Theorem for Strongly Correlated Electron Systems (2004)
Korshunov, M. M., Ovchinnikov, S. G.
Analyzing general structure of the Green function of a strongly correlated electron system we have shown that for the regime of strong correlations Luttinger's theorem should be generalized in the...
Korshunov, M. M., Gavrichkov, V. A., Ovchinnikov, S. G., Pchelkina, Z. V., Nekrasov, I. A., Korotin, M. A., ...
The present paper covers the problem of parameters determination for High-$T_c$ superconductive copper oxides. Different approaches, {\it ab initio} LDA and LDA+U calculations and Generalized...
Ovchinnikov, S. G., Borisov, A. A., Gavrichkov, V. A., Korshunov, M. M.
In the framework of the generalized tight binding method we have calculated the quasiparticle band structure and the spectral functions of the undoped cuprates like $La_2 CuO_4$, $Sr_2CuO_2Cl_2$ etc....