Mott-Kondo insulator behavior in the iron oxychalcogenides

From National Research Council Canada

Download
  1. (PDF, 1 MB)
DOIResolve DOI: https://doi.org/10.1103/PhysRevB.92.155139
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: 1; Search for: 1; Search for: ; Search for: ; Search for: ; Search for:
Name affiliation
  1. National Research Council of Canada. Security and Disruptive Technologies
FormatText, Article
Journal titlePhysical Review B
ISSN1098-0121
1550-235X
Volume92
Issue15
Article number155139
Pages155139-1–155139-10
Abstract
We perform a combined experimental-theoretical study of the Fe-oxychalcogenides (FeOCh) series La2O2Fe2OM2 (M=S, Se), which are among the latest Fe-based materials with the potential to show unconventional high-Tc superconductivity (HTSC). A combination of incoherent Hubbard features in x-ray absorption and resonant inelastic x-ray scattering spectra, as well as resistivity data, reveal that the parent FeOCh are correlation-driven insulators. To uncover microscopics underlying these findings, we perform local density approximation-plus-dynamical mean field theory (LDA+DMFT) calculations that reveal a novel Mott-Kondo insulating state. Based upon good agreement between theory and a range of data, we propose that FeOCh may constitute an ideal testing ground to explore HTSC arising from a strange metal proximate to a novel selective-Mott quantum criticality.
Publication date
PublisherAmerican Physical Society
LanguageEnglish
Peer reviewedYes
NPARC number23001562
Export citationExport as RIS
Report a correctionReport a correction
Record identifierf5ffbfbc-c3ec-4f0a-b274-a0d29c348237
Record created2017-03-07
Record modified2020-05-30
Report a problem on this page
Date modified: