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PhysRevB.106.075151.pdf1.87 MBAdobe PDF見る/開く
PhysRevB.106.075151_suppl.pdfSupplemental Material1.5 MBAdobe PDF見る/開く
タイトル: Quasi-two-dimensional Fermi surface of superconducting line-nodal metal CaSb₂
著者: Ikeda, Atsutoshi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-9345-2967 (unconfirmed)
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  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-7476-3604 (unconfirmed)
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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