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.
| Original language | English |
|---|---|
| Article number | 063704 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 88 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jan 1 2019 |
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- Physics and Astronomy(all)
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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, 01.01.2019.Research output: Contribution to journal › Article
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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
PY - 2019/1/1
Y1 - 2019/1/1
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
ER -