Zobrazeno 1 - 10
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pro vyhledávání: '"Plakida, N M"'
Autor:
Plakida, N. M.
Publikováno v:
Condens. Matter Phys., 2020, vol. 23, No, 4, 43701
A consistent microscopic theory of superconductivity for strongly correlated electronic systems is presented. The Dyson equation for the normal and anomalous Green functions for the projected (Hubbard) electronic operators is derived. To compare vari
Externí odkaz:
http://arxiv.org/abs/2101.05150
A microscopic theory of the electronic spectrum and of superconductivity within the t-J model on the honeycomb lattice is developed. We derive the equations for the normal and anomalous Green functions in terms of the Hubbard operators by applying th
Externí odkaz:
http://arxiv.org/abs/1904.13126
Autor:
Plakida, N. M.
Publikováno v:
Condens. Matter Phys., 2018, vol. 21, No. 3, 33706
A microscopic theory of electronic spectrum and superconductivity within the $t$-$J$ model on the honeycomb lattice is formulated. The Dyson equation for the normal and anomalous Green functions for the two-band model in terms of the Hubbard operator
Externí odkaz:
http://arxiv.org/abs/1809.10287
We present a spin-rotation-invariant Green-function theory for the dynamic spin susceptibility in the spin-1/2 antiferromagnetic t-J Heisenberg model on the honeycomb lattice. Employing a generalized mean-field approximation for arbitrary temperature
Externí odkaz:
http://arxiv.org/abs/1803.03140
Publikováno v:
Eur. Phys. J. B 90, 48 (2017)
We present a spin-rotation-invariant Green-function theory for the dynamic spin susceptibility in the spin-1/2 antiferromagnetic Heisenberg model on a stacked honeycomb lattice. Employing a generalized mean-field approximation for arbitrary temperatu
Externí odkaz:
http://arxiv.org/abs/1703.08391
We consider the quasi-two-dimensional pseudo-spin-1/2 Kitaev - Heisenberg model proposed for A2IrO3 (A=Li, Na) compounds. The spin-wave excitation spectrum, the sublattice magnetization, and the transition temperatures are calculated in the random ph
Externí odkaz:
http://arxiv.org/abs/1602.01961
Publikováno v:
Eur. Phys. J. B 88, 148 (2015)
A Green-function theory for the dynamic spin susceptibility in the square-lattice spin-1/2 antiferromagnetic compass-Heisenberg model employing a generalized mean-field approximation is presented. The theory describes magnetic long-range order (LRO)
Externí odkaz:
http://arxiv.org/abs/1506.01834
Publikováno v:
JETP Letters 100, 780 (2014)
The spin-wave excitation spectrum, the magnetization, and the N\'{e}el temperature for the quasi-two-dimensional spin-1/2 antiferromagnetic Heisenberg model with compass-model interaction in the plane proposed for iridates are calculated in the rando
Externí odkaz:
http://arxiv.org/abs/1411.3920