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Title: | Quasi-two-dimensional Fermi surface of superconducting line-nodal metal CaSb₂ |
Authors: | Ikeda, Atsutoshi 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 https://orcid.org/0000-0002-7476-3604 (unconfirmed) Maeno, Yoshiteru Paglione, Johnpierre |
Author's alias: | 池田, 敦俊 高橋, 秀光 山根, 聡一郎 米澤, 進吾 前野, 悦輝 |
Issue Date: | 15-Aug-2022 |
Publisher: | American Physical Society (APS) |
Journal title: | Physical Review B |
Volume: | 106 |
Issue: | 7 |
Thesis number: | 075151 |
Abstract: | 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. |
Rights: | ©2022 American Physical Society |
URI: | http://hdl.handle.net/2433/276133 |
DOI(Published Version): | 10.1103/PhysRevB.106.075151 |
Appears in Collections: | Journal Articles |
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