We report the superconductivity of a new quaternary compound ThMo2Si2C, synthesized with the arc-melting technique. The compound crystallizes in a tetragonal CeCr2Si2C-type structure with cell parameters of a = 4.2296 \r{A}and c = 5.3571 \r{A}. An interlayer Si-Si covalent bonding is suggested by the atomic distance. The electrical resistivity and magnetic susceptibility measurements indicate a Pauli-paramagnetic metal with dominant electron-electron scattering in the normal-state. Bulk superconductivity at 2.2 K is demonstrated with a dimensionless specific-heat jump of ΔC/γnT = 0.98. The superconducting parameters of the critical magnetic fields, coherence length, penetration depth, and superconducting energy gap are given.
@article{arxiv.2104.09822,
title = {Superconductivity in ThMo2Si2C with Mo2C Square Net},
author = {Zichen Liu and Baizhuo Li and Yusen Xiao and Qingchen Duan and Yanwei Cui and YuXue Mei and Qian Tao and Shuli Wei and Shugang Tan and Qiang Jing and Qing Lu and Yuping Sun and Yunyan Liu and Shenggui Fu and Hao Jiang and Zhi Ren and Zhu'an Xu and Cao Wang and Guanghan Cao},
journal= {arXiv preprint arXiv:2104.09822},
year = {2021}
}
Comments
14 pages, 6 figures, 3 tables. Accepted for publication in SCIENCE CHINA Physics, Mechanics & Astronomy