1. Superconductivity in Mo4Ga20As with endohedral gallium clusters
- Author
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Bin-Bin Ruan, Le-Wei Chen, Yun-Qing Shi, Jun-Kun Yi, Qing-Song Yang, Meng-Hu Zhou, Ming-Wei Ma, Gen-Fu Chen, and Zhi-An Ren
- Subjects
Superconductivity (cond-mat.supr-con) ,Condensed Matter - Materials Science ,Condensed Matter - Superconductivity ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences ,General Materials Science ,Condensed Matter Physics - Abstract
We report the discovery and detailed investigation of superconductivity in Mo4Ga20As. Mo4Ga20As crystallizes in a space group of I4/m (No. 87), with the lattice parameters a = 12.86352 Å and c = 5.30031 Å. The resistivity, magnetization, and specific heat data reveal Mo4Ga20As 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 Mo4Ga20As is possibly stronger than the BCS weak-coupling limit. First-principles calculations suggest the Fermi level being dominated by the Mo-4d and Ga-4p orbitals.
- Published
- 2023
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