Cr[Formula: see text]AlN and the search for the highest temperature superconductor in the M[Formula: see text]AX family.

Cr[Formula: see text]AlN and the search for the highest temperature superconductor in the M[Formula: see text]AX family.
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DOI:
10.1038/s41598-023-33517-0
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发表时间:
2023-04-21
期刊:
影响因子:
4.6
通讯作者:
Probert, M. I. J.
Probert, M. I. J.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Karaca, E.;Byrne, P. J. P.;Hasnip, P. J.;Probert, M. I. J.

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我们已经开发了一种高通量的计算方法来预测稳定的六方MAX相的超导转变温度,并将其应用于所有已知的可能的选择M(M:Sc,Ti,V,Cr,Mn,Fe,Y,Zr,Nb,Mo,Lu,Hf和Ta)。我们联合收割机将其与我们以前工作中的A(A:Al,Cu,Ge和Sn)和X(X:C和N)的最佳候选者相结合,并预测了60种MAX相材料的T,其中53种以前从未研究过。从所有这些,我们确定CrAlN作为最高T的最佳候选者,并确认其高T与更详细的密度泛函理论电子-声子耦合计算。我们的详细计算预测CrAlN = 14.8 K,这明显高于迄今为止MAX系列中任何材料的已知或预测值。
We have developed a high-throughput computational method to predict the superconducting transition temperature in stable hexagonal MAX phases, and applied it to all the known possible choices for M (M: Sc, Ti, V, Cr, Mn, Fe, Y, Zr, Nb, Mo, Lu, Hf and Ta). We combine this with the best candidates for A (A: Al, Cu, Ge and Sn ) and X (X: C and N) from our previous work, and predict T for 60 MAX-phase materials, 53 of which have never been studied before. From all of these, we identify CrAlN as the best candidate for the highest T, and confirm its high T with more detailed density functional theory electron-phonon coupling calculations. Our detailed calculations predict = 14.8 K for CrAlN, which is significantly higher than any value known or predicted for any material in the MAX family to date.
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