Superconductivity in Ternary Mg4Pd7As6

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Advanced Electronic Materials Pub Date : 2024-11-03 DOI:10.1002/aelm.202400284

Hanna Świątek, Sylwia Gutowska, Michał J. Winiarski, Bartlomiej Wiendlocha, Tomasz Klimczuk

引用次数: 0

Abstract

The synthesis and characterization of a new compound Mg₄Pd₇As₆, which is found to be a superconductor with T_c = 5.45 K is reported. Powder X-ray diffraction confirms the U₄Re₇Si₆ structure (space group Im-3m, no. 229) with the lattice parameter a = 8.2572(1) Å. Magnetization, specific heat, and electrical resistivity measurements indicate that it is a moderate-coupling (λ = 0.72) type-II superconductor. The electronic and phonon structures are calculated, highlighting the importance of antibonding Pd–As interactions in determining the properties of this material. The calculated electron–phonon coupling parameter λ = 0.76 agrees very well with the experimental finding, which confirms the conventional pairing mechanism in Mg₄Pd₇As₆.

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三元 Mg4Pd7As6 中的超导性

报告了一种新化合物 Mg4Pd7As6 的合成和特性，发现它是一种 Tc = 5.45 K 的超导体。磁化、比热和电阻率测量结果表明，它是一种中等耦合（λ = 0.72）的 II 型超导体。计算得出的电子结构和声子结构突出了反键 Pd-As 相互作用在决定这种材料特性方面的重要性。计算得出的电子-声子耦合参数 λ = 0.76 与实验结果非常吻合，这证实了 Mg4Pd7As6 中的传统配对机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Electronic Materials NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

11.00

自引率

3.20%

发文量

433

期刊介绍： Advanced Electronic Materials is an interdisciplinary forum for peer-reviewed, high-quality, high-impact research in the fields of materials science, physics, and engineering of electronic and magnetic materials. It includes research on physics and physical properties of electronic and magnetic materials, spintronics, electronics, device physics and engineering, micro- and nano-electromechanical systems, and organic electronics, in addition to fundamental research.