Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
J Phys Condens Matter. 2023 Mar 21;35(21). doi: 10.1088/1361-648X/acc3ec.
We report the discovery and detailed investigation of superconductivity in MoGaAs. MoGaAs crystallizes in a space group of4/(No. 87), with the lattice parameters= 12.86352 Å and= 5.30031 Å. The resistivity, magnetization, and specific heat data reveal MoGaAs to be a type-II superconductor with= 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 MoGaAs is possibly stronger than the BCS weak-coupling limit. First-principles calculations suggest the Fermi level being dominated by the Mo-4and Ga-4orbitals.
我们报告了 MoGaAs 中超导性的发现和详细研究。MoGaAs 晶体属于空间群 4/(No. 87)，晶格参数分别为=12.86352 Å 和=5.30031 Å。电阻率、磁化率和比热数据表明 MoGaAs 是一个=5.6 K 的 II 型超导体。上临界场和下临界场分别估计为 2.78 T 和 22.0 mT。此外，MoGaAs 中的电子-声子耦合可能强于 BCS 弱耦合极限。第一性原理计算表明费米能级主要由 Mo-4 和 Ga-4 轨道决定。
