Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/111444
Title: Magnetic Fluctuations and Superconducting Pairing in ϵ -iron
Authors: Belozerov, A. S.
Katanin, A. A.
Irkhin, V. Yu.
Anisimov, V. I.
Issue Date: 2020
Publisher: American Physical Society
American Physical Society (APS)
Citation: Magnetic Fluctuations and Superconducting Pairing in ϵ -iron / A. S. Belozerov, A. A. Katanin, V. Yu. Irkhin et al. // Physical Review B. — 2020. — Vol. 101. — Iss. 15. — 155126.
Abstract: We study Coulomb correlation effects and their role in superconductivity of ϵ-iron under pressure from 12 to 33 GPa by using a combination of density functional and dynamical mean-field theory. Our results indicate a persistence of the Fermi-liquid behavior below the temperature ∼1000K. The Coulomb correlations are found to substantially renormalize the density of states, reducing the distance from the peak to the Fermi level to 0.4 eV compared to 0.75 eV obtained in DFT calculations. We find significant antiferromagnetic correlations, which are accompanied by the formation of short-lived local magnetic moments. We use the obtained results as a starting point for construction of the multiband Bethe-Salpeter equation, which eigenvalues indicate that antiferromagnetic spin fluctuations may result in the superconducting pairing in ϵ-Fe. Moreover, the tendency to superconducting instability becomes weaker with the increase of pressure, which may explain the disappearance of superconductivity at ∼30GPa. © 2020 American Physical Society.
Keywords: ANTIFERROMAGNETISM
COULOMB BLOCKADE
DENSITY FUNCTIONAL THEORY
EIGENVALUES AND EIGENFUNCTIONS
ELECTRIC CURRENTS
FERMI LIQUIDS
IRON
MAGNETIC MOMENTS
MEAN FIELD THEORY
ANTIFERROMAGNETIC CORRELATIONS
ANTIFERROMAGNETIC SPIN FLUCTUATIONS
BETHE-SALPETER EQUATION
DYNAMICAL MEAN-FIELD THEORY
FERMI LIQUID BEHAVIOR
LOCAL MAGNETIC MOMENTS
MAGNETIC FLUCTUATION
SUPERCONDUCTING PAIRING
SPIN FLUCTUATIONS
URI: http://hdl.handle.net/10995/111444
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85084916184
PURE ID: 12670544
ISSN: 2469-9950
metadata.dc.description.sponsorship: The DFT DMFT calculations and solution of the BSE were supported by Russian Science Foundation (project 19-12-00012). The calculations of the particle-hole bubble were supported by the Ministry of Science and Higher Education of the Russian Federation (theme Electron No. AAAA-A18-118020190098-5).
RSCF project card: 19-12-00012
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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