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ファイル | 記述 | サイズ | フォーマット | |
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PhysRevB.106.075151.pdf | 1.87 MB | Adobe PDF | 見る/開く | |
PhysRevB.106.075151_suppl.pdf | Supplemental Material | 1.5 MB | Adobe PDF | 見る/開く |
タイトル: | Quasi-two-dimensional Fermi surface of superconducting line-nodal metal CaSb₂ |
著者: | Ikeda, Atsutoshi ![]() ![]() ![]() Saha, Shanta Ranjan Graf, David Saraf, Prathum Sokratov, Danila Sergeevich Hu, Yajian Takahashi, Hidemitsu Yamane, Soichiro Jayaraj, Anooja Sławińska, Jagoda Nardelli, Marco Buongiorno Yonezawa, Shingo ![]() ![]() ![]() Maeno, Yoshiteru Paglione, Johnpierre |
著者名の別形: | 池田, 敦俊 高橋, 秀光 山根, 聡一郎 米澤, 進吾 前野, 悦輝 |
発行日: | 15-Aug-2022 |
出版者: | American Physical Society (APS) |
誌名: | Physical Review B |
巻: | 106 |
号: | 7 |
論文番号: | 075151 |
抄録: | We report on the Fermi surfaces and superconducting parameters of CaSb₂ single crystals (superconducting below Tc ~ 1.8 K) grown by the self-flux method. The frequency of de Haas–van Alphen and Shubnikov–de Haas oscillations evidences a quasi-two-dimensional (quasi-2D) Fermi surface, consistent with one of the Fermi surfaces forming Dirac lines predicted by first-principles calculations. Measurements in the superconducting state reveal that CaSb₂ is close to a type-I superconductor with the Ginzburg-Landau parameter of around unity. The temperature dependence of the upper critical field Hc₂ is well described by a model considering two superconducting bands, and the enhancement of the effective mass estimated from Hc₂(0K) is consistent with the quasi-2D band observed by the quantum oscillations. Our results indicate that a quasi-2D band forming Dirac lines contributes to the superconductivity in CaSb₂. |
著作権等: | ©2022 American Physical Society |
URI: | http://hdl.handle.net/2433/276133 |
DOI(出版社版): | 10.1103/PhysRevB.106.075151 |
出現コレクション: | 学術雑誌掲載論文等 |

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