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タイトル: Suppression of the Superconducting Transition Temperature of CaSb₂ by Chemical Substitution著者: Ikeda, Atsutoshi; Yonezawa, Shingo; Maeno, Yoshiteru抄録: We report on the crystal growth and superconducting transition temperature Tc of CaSb₂ with the chemical substitution for Ca. CaSb₂ is a line-nodal material with Tc ≃ 1.7 K. Although CaSb₂ exhibits the conventional superconductivity at ambient pressure, Tc shows an unusual peak under pressure. We found that Tc decreases with the substitutions of Sr and Ba for Ca, consistent with the effect of the negative chemical pressure.

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