Abstract:
The spectral and total electron densities of states in two-dimensional FeAs clusters, which simulate iron-based superconductors, have been calculated using the generalized quantum Monte Carlo algorithm within the full two-orbital model. Spectra have been reconstructed by solving the integral equation relating the Matsubara Green's function and spectral density by the method combining the gradient descent and Monte Carlo algorithms. The calculations have been performed for clusters with dimensions up to 10×10 FeAs cells. The profiles of the Fermi surface for the entire Brillouin zone have been presented in the quasiparticle approximation. Data for the total density of states near the Fermi level have been obtained. The effect of the interaction parameter, size of the cluster, and temperature on the spectrum of excitations has been studied.
Citation:
V. A. Kashurnikov, A. V. Krasavin, Ya. V. Zhumagulov, “Electron density of states of Fe-based superconductors: Quantum trajectory Monte Carlo method”, Pis'ma v Zh. Èksper. Teoret. Fiz., 103:5 (2016), 378–384; JETP Letters, 103:5 (2016), 334–340
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\by V.~A.~Kashurnikov, A.~V.~Krasavin, Ya.~V.~Zhumagulov
\paper Electron density of states of Fe-based superconductors: Quantum trajectory Monte Carlo method
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2016
\vol 103
\issue 5
\pages 378--384
\mathnet{http://mi.mathnet.ru/jetpl4885}
\crossref{https://doi.org/10.7868/S0370274X1605009X}
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\transl
\jour JETP Letters
\yr 2016
\vol 103
\issue 5
\pages 334--340
\crossref{https://doi.org/10.1134/S0021364016050052}
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Linking options:
https://www.mathnet.ru/eng/jetpl4885
https://www.mathnet.ru/eng/jetpl/v103/i5/p378
This publication is cited in the following 4 articles:
Ya. V. Zhumagulov, V. A. Kashurnikov, A. V. Krasavin, A. E. Lukyanov, V. D. Neverov, JETP Letters, 109:1 (2019), 45–50
V. Kashurnikov, A. Krasavin, Ya. Zhumagulov, P. Kartsev, Vii Euro-Asian Symposium Trends in Magnetism, Journal of Physics Conference Series, 1389, eds. V. Ustinov, N. Mushnikov, IOP Publishing Ltd, 2019, 012080
A. V. Krasavin, P. V. Borisyuk, O. S. Vasiliev, Ya. V. Zhumagulov, V. A. Kashurnikov, U. N. Kurelchuk, Yu. Yu. Lebedinskii, Rev. Sci. Instrum., 89:3 (2018), 033907
Kashurnikov V.A., Krasavin A.V., Zhumagulov Ya.V., 5Th International Conference on Mathematical Modeling in Physical Sciences (Ic-Msquare 2016), Journal of Physics Conference Series, 738, eds. Vagenas E., Vlachos D., IOP Publishing Ltd, 2016, UNSP 012020
Citation in format AMSBIB
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