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arXiv 1605.04841cond-mat.mtrl-sci
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第一性原理预言Laves相HfZn2 ~ 0.049 K超导性

Superconductivity at ~ 0.049 K in Laves phase HfZn2 predicted by first principles

Md. Zahidur Rahaman, Md. Atikur Rahman

摘要:

本文报道了Laves相HfZn_2在Tc ~ 0.049 K的超导电性。基于第一性原理方法,我们研究了HfZn_2的详细结构和电子性质,得到了在费米能级上有4.67个电子态eV ~(-1)fu ~(-1)。利用该值,我们理论上计算出比热系数γ为10.97 mJ/ K2 mol,然后系统地计算出电子-声子耦合常数λ为0.45。最后将这些值代入McMillan公式,得到HfZn 2的超导临界温度约为0.049 K。

英文摘要:

We report the superconductivity at Tc ~ 0.049 K in Laves phase HfZn2. Based on the first principles method we have studied the details structural and electronic properties of HfZn2 according to which there are 4.67 states eV-1 fu-1 at Fermi level. Using this value we calculate the specific heat coefficient γ theoretically as 10.97 mJ/ K2 mol and then systematically calculate the electron-phonon coupling constant λ as 0.45. Finally applying these values in McMillan formula we get the superconducting critical temperature of HfZn2 as approximately 0.049 K.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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