| Issue |
EPL
Volume 113, Number 1, January 2016
|
|
|---|---|---|
| Article Number | 17005 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/113/17005 | |
| Published online | 28 January 2016 | |
Normal-state magnetotransport properties of β-FeSe superconductors
1 Centro Atómico Bariloche-CNEA and CONICET - Av. Bustillo 9500, 8400 Bariloche, Argentina
2 Instituto Balseiro, Universidad Nacional de Cuyo and CNEA - 8400 Bariloche, Argentina
3 Sede Andina, Universidad Nacional de Río Negro - 8400 Bariloche, Argentina
Received: 19 November 2015
Accepted: 6 January 2016
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 conductivity and 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 as on the magnetoresistance. Temperature-dependent Hall coefficient data were measured at 16 tesla, and their theoretical description improves upon inclusion of moderate electron correlations. We confirm the effect of the structural transition on the electronic structure, finding deformation-induced band splittings comparable to those reported in angle-resolved photoemission.
PACS: 74.25.F- – Transport properties / 74.70.Xa – Pnictides and chalcogenides / 71.10.-w – Theories and models of many-electron systems
© EPLA, 2016
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