Superconductivity in Mo$_4$Ga$_{20}$As with Endohedral Gallium Clusters

Bin-Bin Ruan; Le-Wei Chen; Yun-Qing Shi; Jun-Kun Yi; Qing-Song Yang; Meng-Hu Zhou; Ming-Wei Ma; Gen-Fu Chen; Zhi-An Ren

doi:10.1088/1361-648X/acc3ec

Superconductivity in Mo$_4$Ga$_{20}$As with Endohedral Gallium Clusters

Superconductivity 2023-05-05 v1 Materials Science

Authors: Bin-Bin Ruan , Le-Wei Chen , Yun-Qing Shi , Jun-Kun Yi , Qing-Song Yang , Meng-Hu Zhou , Ming-Wei Ma , Gen-Fu Chen , Zhi-An Ren

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We report the discovery and detailed investigation of superconductivity in Mo $_4$ Ga $_{20}$ As. Mo $_4$ Ga $_{20}$ As crystallizes in the space group of $I4/m$ (No. 87), with lattice parameters $a$ = 12.86352 \AA and $c$ = 5.30031 \AA. The resistivity, magnetization, and specific heat data reveal Mo $_4$ Ga $_{20}$ As to be a type-II superconductor with $T_c$ = 5.6 K. The upper and lower critical fields are estimated to be 2.78 T and 22.0 mT, respectively. In addition, electron-phonon coupling in Mo $_4$ Ga $_{20}$ As is possibly stronger than the BCS weak-coupling limit. First-principles calculations suggest the Fermi level being dominated by the Mo-4 $d$ and Ga-4 $p$ orbitals.

Keywords

superconductivity Mo4Ga20As type-II superconductor endohedral gallium clusters electron-phonon coupling first-principles calculations

Cite

@article{arxiv.2305.02838,
  title  = {Superconductivity in Mo$_4$Ga$_{20}$As with Endohedral Gallium Clusters},
  author = {Bin-Bin Ruan and Le-Wei Chen and Yun-Qing Shi and Jun-Kun Yi and Qing-Song Yang and Meng-Hu Zhou and Ming-Wei Ma and Gen-Fu Chen and Zhi-An Ren},
  journal= {arXiv preprint arXiv:2305.02838},
  year   = {2023}
}

Superconductivity in Mo$_4$Ga$_{20}$As with Endohedral Gallium Clusters

Abstract

Keywords

Cite

Related papers