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Lee, Geunsik
Electronic Structure and Transport in Condensed Materials
Research Interests
  • open quantum system, non-equilibrium electron transport
  • electron correlation, dynamical mean field theory
  • 2D materials, metal complexes

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Small anisotropy in iron-based superconductors induced by electron correlation

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Title
Small anisotropy in iron-based superconductors induced by electron correlation
Other Titles
Small anisotropy in iron-based superconductors induced by electron correlation
Author
Ji, Hyo SeokLee, GeunsikShim, Ji Hoon
Issue Date
2011-08
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.84, no.5, pp.054542
Abstract
We have investigated the electron correlation effect on the electronic structures and transport properties of the iron-based superconductors using density functional theory (DFT) and dynamical mean field theory (DMFT). By considering the Fe 3d electron correlation using DMFT, the quasiparticle bandwidth near the Fermi level is found to be substantially suppressed compared to the conventional DFT calculation. Because of the different renormalization factors of each 3d orbital, DMFT gives considerably reduced electrical anisotropy compared to DFT results, which explains the unusually small anisotropic resistivity and superconducting property observed in the iron-based superconductors. We suggest that the electron correlation effect should be considered to explain the anisotropic transport properties of the general d/f valence electron system.
URI
https://scholarworks.unist.ac.kr/handle/201301/13137
URL
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.84.054542
DOI
10.1103/PhysRevB.84.054542
ISSN
2469-9950
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CHM_Journal Papers
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