Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/86025
Type: Artigo de periódico
Title: Quantum Oscillations In Eufe2 As2 Single Crystals
Author: Rosa P.F.S.
Zeng B.
Adriano C.
Garitezi T.M.
Grant T.
Fisk Z.
Balicas L.
Johannes M.D.
Urbano R.R.
Pagliuso P.G.
Abstract: Quantum oscillation measurements provide relevant information about the Fermi surface (FS) properties of strongly correlated metals. Here, we report on the Shubnikov-de Haas effect via high-field resistivity measurements of EuFe2As2 (Eu122) and BaFe2As2 (Ba122) single crystals. Although both pnictide compounds are isovalent with similar effective masses and density of states, at the Fermi level, our results reveal subtle changes in their fermiology. Remarkably, although the spin-density-wave (SDW) ordering temperature is higher in the Eu-rich end, Eu122 displays a much more isotropic and three-dimensional-like FS when compared with Ba122, in agreement with band structure calculations. Our experimental results suggest an anisotropic contribution of the Fe 3d orbitals to the FS in Ba122. We speculate that this orbital differentiation may be responsible for the suppression of the SDW phase in the FeAs-based compounds.
Editor: American Physical Society
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.90.195146
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-84919361191&partnerID=40&md5=e16101120c13e5efc6d9e3060d0c4cca
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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