Impact of local atomic fluctuations on superconductivity of Pr-substituted CaFe2As2 studied by X-ray fluorescence holography

Kazutaka Kudo; Satoshi Ioka; Naohisa Happo; Hiromi Ota; Yoshihiro Ebisu; Koji Kimura; Takuma Hada; Takumi Kimura; Hiroo Tajiri; Shinya Hosokawa; Kouichi Hayashi; Minoru Nohara

doi:10.7566/JPSJ.88.063704

Impact of local atomic fluctuations on superconductivity of Pr-substituted CaFe₂As₂ studied by X-ray fluorescence holography

Kazutaka Kudo, Satoshi Ioka, Naohisa Happo, Hiromi Ota, Yoshihiro Ebisu, Koji Kimura, Takuma Hada, Takumi Kimura, Hiroo Tajiri, Shinya Hosokawa, Kouichi Hayashi, Minoru Nohara

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

4 Citations (Scopus)

Abstract

The local structures of Ca₁−_xPr_xFe₂As₂ (x ¼ 0; 0:1) were studied by X-ray fluorescence holography. Significant fluctuations were observed in As positions for CaFe₂As₂. The fluctuations increased strongly around Ca atoms by Pr substitution, while those around the substituted Pr atoms were largely unchanged. The inherent positional fluctuations of As in CaFe₂As₂ can be related to the various bonding forms of As and the complex structure with many energy minima suggested from the single-crystal and powder X-ray diffraction experiments. In the Pr-doped CaFe₂As₂, the increased and unchanged fluctuations around Ca and Pr atoms, respectively, could explain the local superconductivity around Pr atoms and its absence around Ca atoms suggested from scanning tunneling microscopy=spectroscopy.

Original language	English
Article number	063704
Journal	journal of the physical society of japan
Volume	88
Issue number	6
DOIs	https://doi.org/10.7566/JPSJ.88.063704
Publication status	Published - 2019

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.7566/JPSJ.88.063704

Fingerprint Dive into the research topics of 'Impact of local atomic fluctuations on superconductivity of Pr-substituted CaFe<sub>2</sub>As<sub>2</sub> studied by X-ray fluorescence holography'. Together they form a unique fingerprint.

Cite this

Impact of local atomic fluctuations on superconductivity of Pr-substituted CaFe₂As₂ studied by X-ray fluorescence holography. / Kudo, Kazutaka; Ioka, Satoshi; Happo, Naohisa; Ota, Hiromi; Ebisu, Yoshihiro; Kimura, Koji; Hada, Takuma; Kimura, Takumi; Tajiri, Hiroo; Hosokawa, Shinya; Hayashi, Kouichi; Nohara, Minoru.

In: journal of the physical society of japan, Vol. 88, No. 6, 063704, 2019.

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

Kudo, Kazutaka ; Ioka, Satoshi ; Happo, Naohisa ; Ota, Hiromi ; Ebisu, Yoshihiro ; Kimura, Koji ; Hada, Takuma ; Kimura, Takumi ; Tajiri, Hiroo ; Hosokawa, Shinya ; Hayashi, Kouichi ; Nohara, Minoru. / Impact of local atomic fluctuations on superconductivity of Pr-substituted CaFe₂As₂ studied by X-ray fluorescence holography. In: journal of the physical society of japan. 2019 ; Vol. 88, No. 6.

@article{45d0e744eef94b67b5b856addfe09a48,

title = "Impact of local atomic fluctuations on superconductivity of Pr-substituted CaFe2As2 studied by X-ray fluorescence holography",

abstract = "The local structures of Ca1−xPrxFe2As2 (x ¼ 0; 0:1) were studied by X-ray fluorescence holography. Significant fluctuations were observed in As positions for CaFe2As2. The fluctuations increased strongly around Ca atoms by Pr substitution, while those around the substituted Pr atoms were largely unchanged. The inherent positional fluctuations of As in CaFe2As2 can be related to the various bonding forms of As and the complex structure with many energy minima suggested from the single-crystal and powder X-ray diffraction experiments. In the Pr-doped CaFe2As2, the increased and unchanged fluctuations around Ca and Pr atoms, respectively, could explain the local superconductivity around Pr atoms and its absence around Ca atoms suggested from scanning tunneling microscopy=spectroscopy.",

author = "Kazutaka Kudo and Satoshi Ioka and Naohisa Happo and Hiromi Ota and Yoshihiro Ebisu and Koji Kimura and Takuma Hada and Takumi Kimura and Hiroo Tajiri and Shinya Hosokawa and Kouichi Hayashi and Minoru Nohara",

note = "Funding Information: Acknowledgments This work was partially supported by Grants-in-Aid for Scientific Research (15H01047, 15H05886, and 16K05451) provided by the Japan Society for the Promotion of Science. The X-ray fluorescence holography experiments using synchrotron radiation at BL13XU, SPring-8, Japan, were supported by the Japan Synchrotron Radiation Research Institute (Proposal Nos. 2015B1431, 2016A1302, and 2016B1376).",

year = "2019",

doi = "10.7566/JPSJ.88.063704",

language = "English",

volume = "88",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "6",

}

TY - JOUR

T1 - Impact of local atomic fluctuations on superconductivity of Pr-substituted CaFe2As2 studied by X-ray fluorescence holography

AU - Kudo, Kazutaka

AU - Ioka, Satoshi

AU - Happo, Naohisa

AU - Ota, Hiromi

AU - Ebisu, Yoshihiro

AU - Kimura, Koji

AU - Hada, Takuma

AU - Kimura, Takumi

AU - Tajiri, Hiroo

AU - Hosokawa, Shinya

AU - Hayashi, Kouichi

AU - Nohara, Minoru

N1 - Funding Information: Acknowledgments This work was partially supported by Grants-in-Aid for Scientific Research (15H01047, 15H05886, and 16K05451) provided by the Japan Society for the Promotion of Science. The X-ray fluorescence holography experiments using synchrotron radiation at BL13XU, SPring-8, Japan, were supported by the Japan Synchrotron Radiation Research Institute (Proposal Nos. 2015B1431, 2016A1302, and 2016B1376).

PY - 2019

Y1 - 2019

N2 - The local structures of Ca1−xPrxFe2As2 (x ¼ 0; 0:1) were studied by X-ray fluorescence holography. Significant fluctuations were observed in As positions for CaFe2As2. The fluctuations increased strongly around Ca atoms by Pr substitution, while those around the substituted Pr atoms were largely unchanged. The inherent positional fluctuations of As in CaFe2As2 can be related to the various bonding forms of As and the complex structure with many energy minima suggested from the single-crystal and powder X-ray diffraction experiments. In the Pr-doped CaFe2As2, the increased and unchanged fluctuations around Ca and Pr atoms, respectively, could explain the local superconductivity around Pr atoms and its absence around Ca atoms suggested from scanning tunneling microscopy=spectroscopy.

AB - The local structures of Ca1−xPrxFe2As2 (x ¼ 0; 0:1) were studied by X-ray fluorescence holography. Significant fluctuations were observed in As positions for CaFe2As2. The fluctuations increased strongly around Ca atoms by Pr substitution, while those around the substituted Pr atoms were largely unchanged. The inherent positional fluctuations of As in CaFe2As2 can be related to the various bonding forms of As and the complex structure with many energy minima suggested from the single-crystal and powder X-ray diffraction experiments. In the Pr-doped CaFe2As2, the increased and unchanged fluctuations around Ca and Pr atoms, respectively, could explain the local superconductivity around Pr atoms and its absence around Ca atoms suggested from scanning tunneling microscopy=spectroscopy.

UR - http://www.scopus.com/inward/record.url?scp=85067278043&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85067278043&partnerID=8YFLogxK

U2 - 10.7566/JPSJ.88.063704

DO - 10.7566/JPSJ.88.063704

M3 - Article

AN - SCOPUS:85067278043

VL - 88

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 6

M1 - 063704