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Pressure-induced superconductivity beyond magnetic quantum criticality in a Kondo ferromagnet
Pressure-induced superconductivity beyond magnetic quantum criticality in a Kondo ferromagnet
Published: 12 May 2026 · Updated: 13 July 2026
Read the original sourceThe Critique
The claim that superconductivity appearing beyond the QCP indicates pairing "beyond spin-fluctuations" is too strong. Alternative explanation: spin fluctuations may persist beyond the QCP (they don't vanish immediately), or other bosonic modes (valence fluctuations, phonons) could mediate pairing. The paper doesn't rule out extended spin-fluctuation regimes or multi-band effects. They also don't discuss whether the ferromagnetic QCP is actually reached or if the first-order transition prevents true quantum criticality.
Why It Matters
If superconductivity near ferromagnetic QCPs follows different rules than antiferromagnetic QCPs, this expands the theoretical landscape. But if the conclusion rests on premature dismissal of spin-fluctuations, this could mislead the field.