Normal state magnetotransport properties of β-FeSe superconductors

J. D. QUERALES-FLORES; M. L. AMIGÓ; G. NIEVA; C. I. VENTURA

Natal

Workshop; FERMI-SURFACE TOPOLOGY AND EMERGENCE OF NOVEL ELECTRONIC STATES IN STRONGLY CORRELATED SYSTEMS; 2016

International Institute of Physics

We present β-FeSe magnetotransport data, and describe them theoretically. Using a simplified microscopic model with two correlated effective orbitals, we determined the normal state electrical conductivityand Hall coefficient, using Kubo formalism. With model parameters relevant for Fe-chalcogenides, we describe the observed effect of the structural transition on the ab-plane electrical resistivity, as well ason the magnetoresistance. Temperature-dependent Hall coefficient data were measured at 16 Tesla, and their theoretical description improves upon inclusion of moderate electron correlations. We confirmthe effect of the structural transition on the electronic structure, finding deformation-induced band splittings comparable to those reported in angle-resolved photoemission.