Superconductivity in ThMo2Si2C with Mo2C Square Net
Zichen Liu, Baizhuo Li, Yusen Xiao, Qingchen Duan, Yanwei Cui, YuXue, Mei, Qian Tao, Shuli Wei, Shugang Tan, Qiang Jing, Qing Lu, Yuping Sun,, Yunyan Liu, Shenggui Fu, Hao Jiang, Zhi Ren, Zhu'an Xu, Cao Wang, Guanghan, Cao
TL;DR
This paper reports the discovery of superconductivity at 2.2 K in a newly synthesized ThMo2Si2C compound with a tetragonal structure, highlighting its electronic properties and superconducting parameters.
Contribution
The study introduces a new ThMo2Si2C compound exhibiting bulk superconductivity, with detailed structural, electronic, and superconducting property characterization.
Findings
Superconductivity observed at 2.2 K in ThMo2Si2C.
ThMo2Si2C has a tetragonal CeCr2Si2C-type structure.
The compound is a Pauli-paramagnetic metal with electron-electron scattering.
Abstract
We report the superconductivity of a new quaternary compound ThMoSiC, synthesized with the arc-melting technique. The compound crystallizes in a tetragonal CeCrSiC-type structure with cell parameters of = 4.2296 \r{A}and = 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 = 0.98. The superconducting parameters of the critical magnetic fields, coherence length, penetration depth, and superconducting energy gap are given.
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