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镧和磷共掺杂 CaFe₂As₂中 45 K 超导电性的出现。

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

机构信息

Department of Physics, Okayama University, Okayama 700-8530, Japan.

出版信息

Sci Rep. 2013;3:1478. doi: 10.1038/srep01478.

DOI:10.1038/srep01478
PMID:23503148
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3600592/
Abstract

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.

摘要

镧和磷共掺杂 CaFe₂As₂ 诱导出 45 K 的超导性。这个超导转变温度高于 Ba₁-xKxFe₂As₂ 的 38 K 转变温度，是迄今为止在 122 相中发现的最高温度。在 Ca₁-xLaxFe₂(As₁-yPy)₂ 中，当 0.12 ≤ x ≤ 0.18 且 y = 0.06 时，观察到具有大量屏蔽体积分数的超导性。本系统的超导相似乎与反铁磁相不相邻。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/af12/3600592/91ecf31e547e/srep01478-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/af12/3600592/e6e5c32fa812/srep01478-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/af12/3600592/453a1451ba7b/srep01478-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/af12/3600592/4f043fc4c2c5/srep01478-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/af12/3600592/91ecf31e547e/srep01478-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/af12/3600592/e6e5c32fa812/srep01478-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/af12/3600592/453a1451ba7b/srep01478-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/af12/3600592/4f043fc4c2c5/srep01478-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/af12/3600592/91ecf31e547e/srep01478-f4.jpg

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