Superconductivity in pressurized CeRhGe3 and related noncentrosymmetric compounds

Honghong Wang, Jing Guo, Eric D. Bauer, Vladimir A. Sidorov, Hengcan Zhao, Jiahao Zhang, Yazhou Zhou, Zhe Wang, Shu Cai, Ke Yang, Aiguo Li, Xiaodong Li (+7 others)
2018 Physical review B  
We report the discovery of superconductivity in pressurized CeRhGe3, until now the only remaining non-superconducting member of the isostructural family of non-centrosymmetric heavy-fermion compounds CeTX3 (T = Co, Rh, Ir and X = Si, Ge). Superconductivity appears in CeRhGe3 at a pressure of 19.6 GPa and the transition temperature Tc reaches a maximum value of 1.3 K at 21.5 GPa. This finding provides an opportunity to establish systematic correlations between superconductivity and materials
more » ... erties within this family. Though ambient-pressure unit-cell volumes and critical pressures for superconductivity vary substantially across the series, all family members reach a maximum Tcmax at a common critical cell volume Vcrit, and Tcmax at Vcrit increases with increasing spin-orbit coupling strength of the d-electrons. These correlations show that substantial Kondo hybridization and spin-orbit coupling favor superconductivity in this family, the latter reflecting the role of broken centro-symmetry.
doi:10.1103/physrevb.97.064514 fatcat:xm2taof4nnfwvlkcp5zbjsm6n4