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Quantum oscillations in the SmFeAsO parent compound and superconducting SmFeAs(O,F)

Authors :
Fabio Bernardini
L. Repetto
Mario Putti
A. Jost
Uli Zeitler
Masaya Fujioka
Yoshihiko Takano
A. Leveratto
I. Pallecchi
Federico Caglieris
Source :
Physical Review B, 96, 10, pp. 1-5, Physical Review B 96 (2017). doi:10.1103/PhysRevB.96.104508, info:cnr-pdr/source/autori:Caglieris F.; Leveratto A.; Pallecchi I.; Bernardini F.; Fujioka M.; Takano Y.; Repetto L.; Jost A.; Zeitler U.; Putti M./titolo:Quantum oscillations in the SmFeAsO parent compound and superconducting SmFeAs(O,F)/doi:10.1103%2FPhysRevB.96.104508/rivista:Physical Review B/anno:2017/pagina_da:/pagina_a:/intervallo_pagine:/volume:96, Physical Review B, 96, 1-5
Publication Year :
2017

Abstract

By carrying out magnetotransport measurements up to 30 T, we succeeded in detecting and analyzing quantitatively Shubnikov--de Haas oscillations in two crystals of the $RE\mathrm{FeAsO}$ ($RE=\mathrm{rare}\phantom{\rule{0.28em}{0ex}}\mathrm{earth}$) family of iron pnictides, namely, the undoped SmFeAsO and the superconducting fluorine underdoped SmFeAs(O,F). We combine experimental outcomes and ab initio calculations of electronic structure to get the following direct evidences: (i) the Shubnikov--de Haas oscillations are determined by a two-dimensional hole band, whose effective mass is ${m}^{*}=(0.50\ifmmode\pm\else\textpm\fi{}0.1)\phantom{\rule{0.16em}{0ex}}{m}_{e}$ in the undoped sample and ${m}^{*}=(0.89\ifmmode\pm\else\textpm\fi{}0.1)\phantom{\rule{0.16em}{0ex}}{m}_{e}$ in the F-doped sample, while classical magnetotransport is dominated by an electron band; (ii) in the superconducting compound we give a quantitative account of the low effectiveness of electron doping associated with fluorine substitution.

Details

ISSN :
24699950
Database :
OpenAIRE
Journal :
Physical Review B, 96, 10, pp. 1-5, Physical Review B 96 (2017). doi:10.1103/PhysRevB.96.104508, info:cnr-pdr/source/autori:Caglieris F.; Leveratto A.; Pallecchi I.; Bernardini F.; Fujioka M.; Takano Y.; Repetto L.; Jost A.; Zeitler U.; Putti M./titolo:Quantum oscillations in the SmFeAsO parent compound and superconducting SmFeAs(O,F)/doi:10.1103%2FPhysRevB.96.104508/rivista:Physical Review B/anno:2017/pagina_da:/pagina_a:/intervallo_pagine:/volume:96, Physical Review B, 96, 1-5
Accession number :
edsair.doi.dedup.....d467ce8c04f9beea569813624cb93718
Full Text :
https://doi.org/10.1103/PhysRevB.96.104508