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JETP Letters

, Volume 103, Issue 5, pp 334–340 | Cite as

Electron density of states of Fe-based superconductors: Quantum trajectory Monte Carlo method

  • V. A. KashurnikovEmail author
  • A. V. Krasavin
  • Ya. V. Zhumagulov
Condensed Matter

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.

Keywords

Fermi Level Interaction Parameter JETP Letter Total Density Monte Carlo Algorithm 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Inc. 2016

Authors and Affiliations

  • V. A. Kashurnikov
    • 1
    Email author
  • A. V. Krasavin
    • 1
  • Ya. V. Zhumagulov
    • 1
  1. 1.National Research Nuclear University MEPhIMoscowRussia

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