Importance of itinerancy and quantum fluctuations for the magnetism in ironpnictides

Yu Zhong Zhang, Hunpyo Lee, Ingo Opahle, Harald Olaf Jeschke, Roser Valentí

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

By applying density functional theory, we find strong evidence for an itinerant nature of magnetism in two families of iron pnictides. Furthermore, by employing dynamical mean field theory with continuous time quantum Monte Carlo as an impurity solver, we observe that the antiferromagnetic metal with small magnetic moment naturally arises out of coupling between unfrustrated and frustrated bands. Our results point to a possible scenario for magnetism in iron pnictides where magnetism originates from a strong instability at the momentum vector (π,π,π) while it is reduced by quantum fluctuations due to the coupling between weakly and strongly frustrated bands.

Original languageEnglish
Pages (from-to)324-328
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume72
Issue number5
DOIs
Publication statusPublished - May 2011
Externally publishedYes

Fingerprint

Group 5A compounds
Magnetism
iron
Iron
Mean field theory
magnetic moments
density functional theory
Magnetic moments
momentum
impurities
Density functional theory
Momentum
Metals
metals
Impurities

Keywords

  • A. Superconductors
  • C. Ab initio calculations
  • D. Fermi surface
  • D. Phase transitions
  • D. Spin-density waves

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)

Cite this

Importance of itinerancy and quantum fluctuations for the magnetism in ironpnictides. / Zhang, Yu Zhong; Lee, Hunpyo; Opahle, Ingo; Jeschke, Harald Olaf; Valentí, Roser.

In: Journal of Physics and Chemistry of Solids, Vol. 72, No. 5, 05.2011, p. 324-328.

Research output: Contribution to journalArticle

Zhang, Yu Zhong ; Lee, Hunpyo ; Opahle, Ingo ; Jeschke, Harald Olaf ; Valentí, Roser. / Importance of itinerancy and quantum fluctuations for the magnetism in ironpnictides. In: Journal of Physics and Chemistry of Solids. 2011 ; Vol. 72, No. 5. pp. 324-328.
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