Fast spin fluctuation viewed by muon spin relaxation in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xF x

Kazuki Ohishi, Yasuyuki Ishii, Kiichi Miyazawa, Hideto Fukazawa, Isao Watanabe, Yoh Kohori, Parasharam M. Shirage, Hijiri Kito, Akira Iyo, Hiroshi Eisaki

研究成果: Article

2 引用 (Scopus)

抄録

Zero-field and longitudinal-field muon spin relaxation (μSR) measurements have been performed in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xFx in order to investigate the spin dynamics over a wide temperature range. We have observed no sign of the slowing-down behavior of the spin fluctuations in all samples below and above the superconducting transition temperature. The results of the present study suggest that spins, which would play an important role in the appearance of superconductivity with the characteristics of the Fermi surface, fluctuate rapidly from the viewpoint of μSR and their fluctuation frequency is beyond the upper limit of the characteristic time window of μSR (∼10-11 s) in optimally doped and overdoped LaFeAsO 1-xFx.

元の言語English
記事番号024703
ジャーナルJournal of the Physical Society of Japan
80
発行部数2
DOI
出版物ステータスPublished - 2011 2
外部発表Yes

Fingerprint

muons
iron
spin dynamics
Fermi surfaces
superconductivity
transition temperature
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

これを引用

Fast spin fluctuation viewed by muon spin relaxation in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xF x. / Ohishi, Kazuki; Ishii, Yasuyuki; Miyazawa, Kiichi; Fukazawa, Hideto; Watanabe, Isao; Kohori, Yoh; Shirage, Parasharam M.; Kito, Hijiri; Iyo, Akira; Eisaki, Hiroshi.

:: Journal of the Physical Society of Japan, 巻 80, 番号 2, 024703, 02.2011.

研究成果: Article

Ohishi, Kazuki ; Ishii, Yasuyuki ; Miyazawa, Kiichi ; Fukazawa, Hideto ; Watanabe, Isao ; Kohori, Yoh ; Shirage, Parasharam M. ; Kito, Hijiri ; Iyo, Akira ; Eisaki, Hiroshi. / Fast spin fluctuation viewed by muon spin relaxation in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xF x. :: Journal of the Physical Society of Japan. 2011 ; 巻 80, 番号 2.
@article{03ed5f34ba6545e29a67700d046bbff7,
title = "Fast spin fluctuation viewed by muon spin relaxation in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xF x",
abstract = "Zero-field and longitudinal-field muon spin relaxation (μSR) measurements have been performed in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xFx in order to investigate the spin dynamics over a wide temperature range. We have observed no sign of the slowing-down behavior of the spin fluctuations in all samples below and above the superconducting transition temperature. The results of the present study suggest that spins, which would play an important role in the appearance of superconductivity with the characteristics of the Fermi surface, fluctuate rapidly from the viewpoint of μSR and their fluctuation frequency is beyond the upper limit of the characteristic time window of μSR (∼10-11 s) in optimally doped and overdoped LaFeAsO 1-xFx.",
keywords = "μSR, Iron-based oxypnictide, LaFeAsO F, Normal state, Superconductivity",
author = "Kazuki Ohishi and Yasuyuki Ishii and Kiichi Miyazawa and Hideto Fukazawa and Isao Watanabe and Yoh Kohori and Shirage, {Parasharam M.} and Hijiri Kito and Akira Iyo and Hiroshi Eisaki",
year = "2011",
month = "2",
doi = "10.1143/JPSJ.80.024703",
language = "English",
volume = "80",
journal = "Journal of the Physical Society of Japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "2",

}

TY - JOUR

T1 - Fast spin fluctuation viewed by muon spin relaxation in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xF x

AU - Ohishi, Kazuki

AU - Ishii, Yasuyuki

AU - Miyazawa, Kiichi

AU - Fukazawa, Hideto

AU - Watanabe, Isao

AU - Kohori, Yoh

AU - Shirage, Parasharam M.

AU - Kito, Hijiri

AU - Iyo, Akira

AU - Eisaki, Hiroshi

PY - 2011/2

Y1 - 2011/2

N2 - Zero-field and longitudinal-field muon spin relaxation (μSR) measurements have been performed in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xFx in order to investigate the spin dynamics over a wide temperature range. We have observed no sign of the slowing-down behavior of the spin fluctuations in all samples below and above the superconducting transition temperature. The results of the present study suggest that spins, which would play an important role in the appearance of superconductivity with the characteristics of the Fermi surface, fluctuate rapidly from the viewpoint of μSR and their fluctuation frequency is beyond the upper limit of the characteristic time window of μSR (∼10-11 s) in optimally doped and overdoped LaFeAsO 1-xFx.

AB - Zero-field and longitudinal-field muon spin relaxation (μSR) measurements have been performed in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xFx in order to investigate the spin dynamics over a wide temperature range. We have observed no sign of the slowing-down behavior of the spin fluctuations in all samples below and above the superconducting transition temperature. The results of the present study suggest that spins, which would play an important role in the appearance of superconductivity with the characteristics of the Fermi surface, fluctuate rapidly from the viewpoint of μSR and their fluctuation frequency is beyond the upper limit of the characteristic time window of μSR (∼10-11 s) in optimally doped and overdoped LaFeAsO 1-xFx.

KW - μSR

KW - Iron-based oxypnictide

KW - LaFeAsO F

KW - Normal state

KW - Superconductivity

UR - http://www.scopus.com/inward/record.url?scp=79951601367&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79951601367&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.80.024703

DO - 10.1143/JPSJ.80.024703

M3 - Article

AN - SCOPUS:79951601367

VL - 80

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 2

M1 - 024703

ER -