Superconductivity in Ternary Mg₄Pd₇As₆

Author(s)

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

Abstract

The synthesis and characterization of a new compound Mg4Pd7As6, which is found to be a superconductor with Tc = 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.

Organisation(s)

Computational Materials Physics

External organisation(s)

Gdansk University of Technology, AGH University of Science and Technology

Journal

Advanced Electronic Materials

No. of pages

12

ISSN

2199-160X

DOI

https://doi.org/10.1002/aelm.202400284

Publication date

11-2024

Peer reviewed

Yes

Austrian Fields of Science 2012

103033 Superconductivity, 103018 Materials physics

Keywords

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

Portal url

https://ucrisportal.univie.ac.at/en/publications/397f5dbe-f932-403c-a5ea-85ee25e4421c