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arXiv 0908.4135cond-mat.supr-concond-mat.mtrl-sci
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新型“122”无磷元素超导体SrPd2Ge2与SrNi2Ge2和SrNi2As2的结构和电子性质比较:第一性原理计算

Structural and electronic properties of new "122" pnictogen-free superconductor SrPd2Ge2 as compared with SrNi2Ge2 and SrNi2As2: first principles calculations

I. R. Shein, A. L. Ivanovskii

摘要:

最近报道了一种新的低温(TC ~ 3 K)超导体(SC)SrPd_2Ge_2。该化合物与目前广泛研究的所谓“122”SC(基于四元AM 2 Pn 2相,其中A是Sr、Ba; M是d金属,Pn是磷属元素:As或P)的组同构,但它不含磷属元素。在这里,通过第一性原理FLAPW-GGA计算,我们研究了新的SC SrPd_2Ge_2的电子结构。计算了SrPd_2Ge_2的能带结构、总态密度和分态密度以及费米面拓扑结构,并与同结构的SrNi_2Ge_2和SrNi_2As_2相进行了比较。

英文摘要:

Very recently the new low-temperature (TC ~ 3K) superconductor (SC) SrPd2Ge2 has been reported. This compound is isostructural with curently intensively studied group of so-called "122" SC's (based on tetragonal AM2Pn2 phases, where A are Sr, Ba; M are d metals and Pn are pnictogens: As or P), but it is pnictogen-free. Here, by means of first-principle FLAPW-GGA calculations, we have studied the electronic structure of new SC SrPd2Ge2. The band structure, total and partial densities of states and Fermi surface topology for SrPd2Ge2 are evaluated and discussed in comparison with those of isostructural SrNi2Ge2 and SrNi2As2 phases.

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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