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
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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@article{0453ac0711674965b11aacfa9e856828,

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",

note = "Funding Information: We would like to thank S. Kittaka, M. Kriener and T. Nakamura for valuable discussions. This work was supported by a Grant-in-Aid for the Global COE Program “ The Next Generation of Physics, Spun from Universality and Emergence” from MEXT of Japan and by a Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) . Y.N. is supported by JSPS.",

year = "2010",

month = dec,

doi = "10.1016/j.physc.2009.10.106",

language = "English",

volume = "470",

pages = "S282--S283",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "SUPPL.1",

}

TY - JOUR

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.

N1 - Funding Information: We would like to thank S. Kittaka, M. Kriener and T. Nakamura for valuable discussions. This work was supported by a Grant-in-Aid for the Global COE Program “ The Next Generation of Physics, Spun from Universality and Emergence” from MEXT of Japan and by a Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) . Y.N. is supported by JSPS.

PY - 2010/12

Y1 - 2010/12

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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DO - 10.1016/j.physc.2009.10.106

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