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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2406.01263 |
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| _version_ | 1866914843210022912 |
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| author | Sasaki, Miku Inada, Kotaro Mori, Fumito Hirase, Takaaki Yamada, Haruki Shimoyama, Shota Nakamura, Yasushi Nakamura, Tetta Shibayama, Yoshiyuki Momono, Naoki |
| author_facet | Sasaki, Miku Inada, Kotaro Mori, Fumito Hirase, Takaaki Yamada, Haruki Shimoyama, Shota Nakamura, Yasushi Nakamura, Tetta Shibayama, Yoshiyuki Momono, Naoki |
| contents | We examined the effect of Pb substitution in the layered superconductor LaO0.5F0.5Bi1-xPbxS2 (x=0~0.15) through the measurements of the resistivity, thermal expansion, specific heat, and Seebeck coefficient. These transport and thermal properties show anomalies at certain temperatures (T*) for x${\geq}$0.08. The large thermal expansion anomalies, specific heat anomalies, and the existence of hystereses in the above measurements indicate a first-order structural phase transition at T*. Additionally, the Seebeck coefficient indicates that the anomalies at T* are related not only to the lattice system, but also to the electronic system. Superconductivity is not observed above 2 K at x=0.08, which is around the phase boundary where T* vanishes. The suppression of superconductivity around the structural phase boundary suggests a close relationship between the lattice and superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_01263 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pb Substitution Effects on Lattice and Electronic System of the BiS2-based Superconductors La(O F)BiS2 Sasaki, Miku Inada, Kotaro Mori, Fumito Hirase, Takaaki Yamada, Haruki Shimoyama, Shota Nakamura, Yasushi Nakamura, Tetta Shibayama, Yoshiyuki Momono, Naoki Superconductivity We examined the effect of Pb substitution in the layered superconductor LaO0.5F0.5Bi1-xPbxS2 (x=0~0.15) through the measurements of the resistivity, thermal expansion, specific heat, and Seebeck coefficient. These transport and thermal properties show anomalies at certain temperatures (T*) for x${\geq}$0.08. The large thermal expansion anomalies, specific heat anomalies, and the existence of hystereses in the above measurements indicate a first-order structural phase transition at T*. Additionally, the Seebeck coefficient indicates that the anomalies at T* are related not only to the lattice system, but also to the electronic system. Superconductivity is not observed above 2 K at x=0.08, which is around the phase boundary where T* vanishes. The suppression of superconductivity around the structural phase boundary suggests a close relationship between the lattice and superconductivity. |
| title | Pb Substitution Effects on Lattice and Electronic System of the BiS2-based Superconductors La(O F)BiS2 |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2406.01263 |