F-doping dependence of 75As nuclear quadrupole resonance frequency in LaFeAs(O1-xFx)

S. Kitagawa; Y. Nakai; T. Iye; K. Ishida; Y. Kamihara; M. Hirano; H. Hosono

doi:10.1016/j.physc.2009.10.106

F-doping dependence of ⁷⁵As nuclear quadrupole resonance frequency in LaFeAs(O_1-xF_x)

S. Kitagawa, Y. Nakai, T. Iye, K. Ishida, Y. Kamihara, M. Hirano, H. Hosono

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

We report the F-doping dependence of ⁷⁵As nuclear quadruple resonance frequency (⁷⁵ν_Q) in the iron-oxypnictide LaFeAs(O_1-xF_x) (x = 0, 0.07, 0.08, 0.11 and 0.14). It was revealed that ⁷⁵ν_Q becomes larger with increasing x up to 0.14. From point charge calculations, we found that experimental F-doping dependence of ⁷⁵ν_Q cannot be accounted for by the effect of surrounding ions. Therefore, the on-site charge distribution at the ⁷⁵As site modified by the hybridization between As-4p and Fe-3d orbitals gives dominant contribution to ⁷⁵ν_Q in LaFeAs(O_1-xF_x).

Original language	English
Pages (from-to)	S282-S283
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.10.106
Publication status	Published - 2010 Dec 1
Externally published	Yes

Keywords

Iron pnictide
LaFeAsO
NQR
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "F-doping dependence of 75As nuclear quadrupole resonance frequency in LaFeAs(O1-xFx)",

abstract = "We report the F-doping dependence of 75As nuclear quadruple resonance frequency (75νQ) in the iron-oxypnictide LaFeAs(O1-xFx) (x = 0, 0.07, 0.08, 0.11 and 0.14). It was revealed that 75νQ becomes larger with increasing x up to 0.14. From point charge calculations, we found that experimental F-doping dependence of 75νQ cannot be accounted for by the effect of surrounding ions. Therefore, the on-site charge distribution at the 75As site modified by the hybridization between As-4p and Fe-3d orbitals gives dominant contribution to 75νQ in LaFeAs(O1-xFx).",

keywords = "Iron pnictide, LaFeAsO, NQR, Superconductivity",

author = "S. Kitagawa and Y. Nakai and T. Iye and K. Ishida and Y. Kamihara and M. Hirano and H. Hosono",

year = "2010",

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T1 - F-doping dependence of 75As nuclear quadrupole resonance frequency in LaFeAs(O1-xFx)

AU - Kitagawa, S.

AU - Nakai, Y.

AU - Iye, T.

AU - Ishida, K.

AU - Kamihara, Y.

AU - Hirano, M.

AU - Hosono, H.

PY - 2010/12/1

Y1 - 2010/12/1

N2 - We report the F-doping dependence of 75As nuclear quadruple resonance frequency (75νQ) in the iron-oxypnictide LaFeAs(O1-xFx) (x = 0, 0.07, 0.08, 0.11 and 0.14). It was revealed that 75νQ becomes larger with increasing x up to 0.14. From point charge calculations, we found that experimental F-doping dependence of 75νQ cannot be accounted for by the effect of surrounding ions. Therefore, the on-site charge distribution at the 75As site modified by the hybridization between As-4p and Fe-3d orbitals gives dominant contribution to 75νQ in LaFeAs(O1-xFx).

AB - We report the F-doping dependence of 75As nuclear quadruple resonance frequency (75νQ) in the iron-oxypnictide LaFeAs(O1-xFx) (x = 0, 0.07, 0.08, 0.11 and 0.14). It was revealed that 75νQ becomes larger with increasing x up to 0.14. From point charge calculations, we found that experimental F-doping dependence of 75νQ cannot be accounted for by the effect of surrounding ions. Therefore, the on-site charge distribution at the 75As site modified by the hybridization between As-4p and Fe-3d orbitals gives dominant contribution to 75νQ in LaFeAs(O1-xFx).

KW - Iron pnictide

KW - LaFeAsO

KW - NQR

KW - Superconductivity

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