Investigation of role of antisite disorder in the pristine cage compound FeGa$_3$

C. Kaufmann Ribeiro; D. Cornejo; E. Fogh; H. M. R{\o}nnow; J. Larrea Jim\'enez; L. Mello; M. B. Silva Neto; V. Martelli

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Investigation of role of antisite disorder in the pristine cage compound FeGa$_3$

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arxiv 2208.09064 v2 pith:PDTRI3NA submitted 2022-08-18 cond-mat.mtrl-sci cond-mat.str-elquant-ph

C. Kaufmann Ribeiro , L. Mello , V. Martelli , D. Cornejo , M. B. Silva Neto , E. Fogh , H. M. R{o}nnow , J. Larrea Jiménez This is my paper · ORCID

classification cond-mat.mtrl-scicond-mat.str-elquant-ph

keywords disorderfegacompoundpristinerolewereanalysisanderson

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abstract

The role of controlled disorder in the strong correlated narrow gap semiconductor candidate FeGa$_3$ has been investigated. Polycrystalline samples were synthesized by the combination of arc-melting furnace and successive annealing processes. Deviations of the occupation number of Fe and Ga sites from those expected in the pristine compound were quantified with X-ray analysis. Besides that, electrical transport and magnetization measurements reveal that hierarchy in Fe and Ga site disorder tunes the ground state of FeGa$_3$ from paramagnetic semiconducting to a magnetic metal. These findings are discussed within the framework of Anderson metal-insulator transitions and spin fluctuations.

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