Electronic and lattice structure of CaFe1−xCoxAsF probed by x-ray absorption spectroscopy
The local lattice and electronic structures of CaFe _1−x Co _x AsF (x = 0, 0.15) are investigated by Fe K -edge and As K -edge x-ray-absorption near-edge structure and extended x-ray-absorption fine structure from 10 to 300 K. A redistribution of electron density of state between Fe(Co) and As atoms...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2019-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab5562 |
| _version_ | 1797747193738690560 |
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| author | Hui Huang Ping Ji Yu Xie Hui Han Binghui Ge |
| author_facet | Hui Huang Ping Ji Yu Xie Hui Han Binghui Ge |
| author_sort | Hui Huang |
| collection | DOAJ |
| description | The local lattice and electronic structures of CaFe _1−x Co _x AsF (x = 0, 0.15) are investigated by Fe K -edge and As K -edge x-ray-absorption near-edge structure and extended x-ray-absorption fine structure from 10 to 300 K. A redistribution of electron density of state between Fe(Co) and As atoms with decreasing temperature has been found in CaFe _0.85 Co _0.15 AsF, resulting in the increase of local density of state near the Fe site. It is found that the doping of Co introduces large static local lattice disorders of the As–Fe(Co) bonds. When we examine the local lattice structure around the Co dopants, we find the static local disorder is much more serious in the Co–As bonds comparing to that of As–Fe(Co) bonds. These facts suggest that strong electron-lattice interaction coexists with superconductivity in Fe-based superconductors. |
| first_indexed | 2024-03-12T15:47:30Z |
| format | Article |
| id | doaj.art-f3e2541b5076431291c94da72a1f2803 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:47:30Z |
| publishDate | 2019-01-01 |
| publisher | IOP Publishing |
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| series | Materials Research Express |
| spelling | doaj.art-f3e2541b5076431291c94da72a1f28032023-08-09T15:22:51ZengIOP PublishingMaterials Research Express2053-15912019-01-017101600110.1088/2053-1591/ab5562Electronic and lattice structure of CaFe1−xCoxAsF probed by x-ray absorption spectroscopyHui Huang0https://orcid.org/0000-0002-5208-6745Ping Ji1Yu Xie2Hui Han3Binghui Ge4https://orcid.org/0000-0002-6470-6278School of Advanced Manufacture and Engineering, Hefei University , Hefei 230601, People’s Republic of China; Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University , Hefei 230601, People’s Republic of ChinaSchool of Advanced Manufacture and Engineering, Hefei University , Hefei 230601, People’s Republic of ChinaSchool of Advanced Manufacture and Engineering, Hefei University , Hefei 230601, People’s Republic of ChinaInstitutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University , Hefei 230601, People’s Republic of ChinaInstitutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University , Hefei 230601, People’s Republic of China; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of ChinaThe local lattice and electronic structures of CaFe _1−x Co _x AsF (x = 0, 0.15) are investigated by Fe K -edge and As K -edge x-ray-absorption near-edge structure and extended x-ray-absorption fine structure from 10 to 300 K. A redistribution of electron density of state between Fe(Co) and As atoms with decreasing temperature has been found in CaFe _0.85 Co _0.15 AsF, resulting in the increase of local density of state near the Fe site. It is found that the doping of Co introduces large static local lattice disorders of the As–Fe(Co) bonds. When we examine the local lattice structure around the Co dopants, we find the static local disorder is much more serious in the Co–As bonds comparing to that of As–Fe(Co) bonds. These facts suggest that strong electron-lattice interaction coexists with superconductivity in Fe-based superconductors.https://doi.org/10.1088/2053-1591/ab5562lattice structureelectronic structurelattice disorderx-ray absorption spectroscopy |
| spellingShingle | Hui Huang Ping Ji Yu Xie Hui Han Binghui Ge Electronic and lattice structure of CaFe1−xCoxAsF probed by x-ray absorption spectroscopy Materials Research Express lattice structure electronic structure lattice disorder x-ray absorption spectroscopy |
| title | Electronic and lattice structure of CaFe1−xCoxAsF probed by x-ray absorption spectroscopy |
| title_full | Electronic and lattice structure of CaFe1−xCoxAsF probed by x-ray absorption spectroscopy |
| title_fullStr | Electronic and lattice structure of CaFe1−xCoxAsF probed by x-ray absorption spectroscopy |
| title_full_unstemmed | Electronic and lattice structure of CaFe1−xCoxAsF probed by x-ray absorption spectroscopy |
| title_short | Electronic and lattice structure of CaFe1−xCoxAsF probed by x-ray absorption spectroscopy |
| title_sort | electronic and lattice structure of cafe1 xcoxasf probed by x ray absorption spectroscopy |
| topic | lattice structure electronic structure lattice disorder x-ray absorption spectroscopy |
| url | https://doi.org/10.1088/2053-1591/ab5562 |
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