Superconductivity in pressurized CeRhGe3 and related non-centrosymmetric compounds

Abstract

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 properties 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.

arXiv comment15 pages and 4 figures

References in corpus (8)

• Superconducting phases of f-electron compounds
• Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
• Reemerging superconductivity at 48 K across quantum criticality in iron chalcogenides
• Comparison of the pressure dependences of Tc in the trivalent d-electron superconductors
• Superconductivity at 17 K in Yttrium Metal under Nearly Hydrostatic Pressures to 89 GPa
• Superconductivity and quantum criticality in heavy fermions CeIrSi${}_3$ and CeRhSi${}_3$
• Correlation and disorder-enhanced nematic spin response in superconductors with weakly broken rotational symmetry
• Textured Superconductivity in the Presence of a Coexisting Order: Ce115s and Other Heavy-Fermion Compounds

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• Anomalous connection between antiferromagnetic and superconducting phases in pressurized non-centrosymmetric heavy fermion compound CeRhGe3
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• Pressure induced superconductivity in a CeRhSi${}_3$ single crystal -- the high pressure study
• An emerging global picture of heavy fermion physics
• Reemergence of superconductivity in pressurized quasi-one-dimensional superconductor K2Mo3As3
• Successive magnetic transitions in heavy fermion superconductor Ce3PtIn11 studied by 115In nuclear quadrupole resonance
• A Family of Lanthanide Noncentrosymmetric Superconductors La${}_4$$TX$ ($T$ = Ru, Rh, Ir; $X$ = Al, In)
• Anisotropic hybridization in a new Kondo lattice compound CeCoInGa${}_3$