In-plane electronic anisotropy resulted from ordered magnetic moment in iron-based superconductors
Year: 2020
Type: article
Abstract: We study the in-plane electronic anisotropy in the parent compounds of several families of Fe-based superconductors (BaFe 2 As 2 , EuFe 2 As 2 , NaFeAs, LiFeAs, FeSe, and LaFeAsO) by polarization-resolved Raman scattering.We measure intensity of the fully symmetric c-axis vibration of As atom mode in the XY scattering geometry and notice that the mode's intensity is significantly enhanced below the magnetostructural transition only for compounds showing magnetic ordering.In particular, we find that the intensity ratio of this As phonon in the XY vs. X X scattering geometries is proportional to the square of the ordered magnetic moment.We relate this As phonon intensity enhancement below the Néel temperature in iron pnictides to in-plane electronic anisotropy induced by the collinear spin-density wave order.
Source: Physical Review Research
Institutions: Rutgers, The State University of New Jersey, Chinese Academy of Sciences, Institute of Physics, Beijing Normal University, Rice University, The University of Tokyo, Kyoto University, Oak Ridge National Laboratory, Université de Sherbrooke, Institut quantique, National Institute of Chemical Physics and Biophysics
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Funders: National Science Foundation, U.S. Department of Energy, Eesti Teadusagentuur, European Research Council, Japan Society for the Promotion of Science, Division of Materials Research, Basic Energy Sciences, Oak Ridge National Laboratory, H2020 European Research Council, Division of Materials Sciences and Engineering
Awards: Sub-THz range polar Kerr spectroscopy of chiral superconductors, G2640724596, Symmetry breaking phenomena in the pseudogap state of cuprates, How do chiral superconductors break time-reversal symmetry? – Kerr spectroscopy study, Rotational symmetry breaking in strongly correlated quantum matters, G8213496232, Low Energy Electrodynamics in Solids with Strong Electron Correlations
OpenAlex ID: W3100348995