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

Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe₂As₂.
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DOI:
10.1038/srep01478
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Nohara, Minoru
Nohara, Minoru
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kudo, Kazutaka;Iba, Keita;Takasuga, Masaya;Kitahama, Yutaka;Matsumura, Jun-ichi;Danura, Masataka;Nogami, Yoshio;Nohara, Minoru

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La-P共掺杂CaFe_2As_2在45 K下具有超导电性。 这一超导转变温度高于Ba 1 − xKxFe 2As 2的38 K转变,这是迄今为止在122个相中发现的最高值。  在Ca 1 − xLaxFe 2(As 1 −yPy)2中,在0.12 ≤ x ≤ 0.18和y = 0.06处观察到具有显著屏蔽体积分数的超导性。本系统的超导相似乎不邻近反铁磁相。
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 ≤ x ≤ 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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