Superconductivity beyond the Conventional Pauli Limit in High-Pressure CeSb2

Oliver P. Squire; Stephen A. Hodgson; Jiasheng Chen; Vitaly Fedoseev; Christian K. de Podesta; Theodore I. Weinberger; Patricia L. Alireza; F. Malte Grosche

doi:10.1103/PhysRevLett.131.026001

Superconductivity beyond the Conventional Pauli Limit in High-Pressure CeSb2

Oliver P. Squire, Stephen A. Hodgson, Jiasheng Chen, Vitaly Fedoseev, Christian K. de Podesta, Theodore I. Weinberger, Patricia L. Alireza, F. Malte Grosche

DOI 10.1103/PhysRevLett.131.026001 · Physical Review Letters

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Abstract

We report the discovery of superconductivity at a pressure-induced magnetic quantum phase transition in the Kondo lattice system CeSb2, sustained up to magnetic fields that exceed the conventional Pauli limit eightfold. Like CeRh2As2, CeSb2 is locally noncentrosymmetric around the Ce site, but the evolution of critical fields and normal state properties as CeSb2 is tuned through the quantum phase transition motivates a fundamentally different explanation for its resilience to applied field.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeSb2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.22	3.16 GPa	midpoint
CeRh2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
UTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown