Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe2As2

Jun-ichi Matsumura; Kazutaka Kudo; Keita Iba; Masataka Danura; Masaya Takasuga; Minoru Nohara; Yoshio Nogami; Yutaka Kitahama

arxiv: 1303.4489 · v1 · pith:NBRN3ZLVnew · submitted 2013-03-19 · ❄️ cond-mat.supr-con

Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe2As2

Kazutaka Kudo , Keita Iba , Masaya Takasuga , Yutaka Kitahama , Jun-ichi Matsumura , Masataka Danura , Yoshio Nogami , Minoru Nohara This is my paper

classification ❄️ cond-mat.supr-con

keywords superconductivitycafe2as2co-dopinglanthanumphasephosphorussuperconductingtransition

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Co-doping of lanthanum and phosphorus in CaFe2As2 induces superconductivity at 45 K. This superconducting transition temperature is higher than the 38 K transition in Ba1-xKxFe2As2, which is the maximum found thus far among the 122 phases. Superconductivity with a substantial shielding volume fraction was observed at 0.12 $\leq$ x $\leq$ 0.18 and y = 0.06 in Ca1-xLaxFe2(As1-yPy)2. The superconducting phase of the present system seems to be not adjacent to an antiferromagnetic phase.

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Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe2As2

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