High-pressure studies on Tc and crystal structure of iron chalcogenide superconductors
The superconducting transition temperature, Tc, in iron-based solids can be enhanced by applied pressure: Tc increases from 8 to 37 K for the 11-type FeSe when the pressure is raised from 0 to 4 GPa. High-pressure studies can elucidate the mechanism of superconductivity in such novel materials. In t...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2012-01-01
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| Series: | Science and Technology of Advanced Materials |
| Online Access: | http://dx.doi.org/10.1088/1468-6996/13/5/054401 |
| _version_ | 1818520949991931904 |
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| author | Hiroki Takahashi, Takahiro Tomita, Hiroyuki Takahashi, Yoshikazu Mizuguchi, Yoshihiko Takano, Satoshi Nakano, Kazuyuki Matsubayashi and Yoshiya Uwatoko |
| author_facet | Hiroki Takahashi, Takahiro Tomita, Hiroyuki Takahashi, Yoshikazu Mizuguchi, Yoshihiko Takano, Satoshi Nakano, Kazuyuki Matsubayashi and Yoshiya Uwatoko |
| author_sort | Hiroki Takahashi, Takahiro Tomita, Hiroyuki Takahashi, Yoshikazu Mizuguchi, Yoshihiko Takano, Satoshi Nakano, Kazuyuki Matsubayashi and Yoshiya Uwatoko |
| collection | DOAJ |
| description | The superconducting transition temperature, Tc, in iron-based solids can be enhanced by applied pressure: Tc increases from 8 to 37 K for the 11-type FeSe when the pressure is raised from 0 to 4 GPa. High-pressure studies can elucidate the mechanism of superconductivity in such novel materials. In this paper, we present a high-pressure study of Fe(Se1−xTex) and Fe(Se1−xSx). In the case of Fe(Se1−xTex), the maximum Tc under high pressure did not exceed the Tc of FeSe, which can be attributed to the structural transition to the monoclinic phase. For Fe(Se1−xSx) (0 < x < 0.3), Tc exhibited a significant increase with pressure; however, the maximum Tc under high pressure did not exceed the Tc of FeSe. This may be due to the disorder induced by substituting S for Se, which is similar to the pressure effect on Tc for the 1111-type superconductor Ca(Fe1−xCox)AsF. The Tc of Fe(Se1−xSx) showed a complex behavior below 1 GPa, first decreasing and then increasing with increasing pressure. From high-pressure x-ray diffraction measurements, the Tc (P) curve was correlated with the local structural parameter. |
| first_indexed | 2024-12-11T01:44:29Z |
| format | Article |
| id | doaj.art-c950c256c9fc4c34b6d17f0e0d872e36 |
| institution | Directory Open Access Journal |
| issn | 1468-6996 1878-5514 |
| language | English |
| last_indexed | 2024-12-11T01:44:29Z |
| publishDate | 2012-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj.art-c950c256c9fc4c34b6d17f0e0d872e362022-12-22T01:24:56ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142012-01-01135054401High-pressure studies on Tc and crystal structure of iron chalcogenide superconductorsHiroki Takahashi, Takahiro Tomita, Hiroyuki Takahashi, Yoshikazu Mizuguchi, Yoshihiko Takano, Satoshi Nakano, Kazuyuki Matsubayashi and Yoshiya UwatokoThe superconducting transition temperature, Tc, in iron-based solids can be enhanced by applied pressure: Tc increases from 8 to 37 K for the 11-type FeSe when the pressure is raised from 0 to 4 GPa. High-pressure studies can elucidate the mechanism of superconductivity in such novel materials. In this paper, we present a high-pressure study of Fe(Se1−xTex) and Fe(Se1−xSx). In the case of Fe(Se1−xTex), the maximum Tc under high pressure did not exceed the Tc of FeSe, which can be attributed to the structural transition to the monoclinic phase. For Fe(Se1−xSx) (0 < x < 0.3), Tc exhibited a significant increase with pressure; however, the maximum Tc under high pressure did not exceed the Tc of FeSe. This may be due to the disorder induced by substituting S for Se, which is similar to the pressure effect on Tc for the 1111-type superconductor Ca(Fe1−xCox)AsF. The Tc of Fe(Se1−xSx) showed a complex behavior below 1 GPa, first decreasing and then increasing with increasing pressure. From high-pressure x-ray diffraction measurements, the Tc (P) curve was correlated with the local structural parameter.http://dx.doi.org/10.1088/1468-6996/13/5/054401 |
| spellingShingle | Hiroki Takahashi, Takahiro Tomita, Hiroyuki Takahashi, Yoshikazu Mizuguchi, Yoshihiko Takano, Satoshi Nakano, Kazuyuki Matsubayashi and Yoshiya Uwatoko High-pressure studies on Tc and crystal structure of iron chalcogenide superconductors Science and Technology of Advanced Materials |
| title | High-pressure studies on Tc and crystal structure of iron chalcogenide superconductors |
| title_full | High-pressure studies on Tc and crystal structure of iron chalcogenide superconductors |
| title_fullStr | High-pressure studies on Tc and crystal structure of iron chalcogenide superconductors |
| title_full_unstemmed | High-pressure studies on Tc and crystal structure of iron chalcogenide superconductors |
| title_short | High-pressure studies on Tc and crystal structure of iron chalcogenide superconductors |
| title_sort | high pressure studies on tc and crystal structure of iron chalcogenide superconductors |
| url | http://dx.doi.org/10.1088/1468-6996/13/5/054401 |
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