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Emergence of superconductivity in heavy-electron materials #MMPMID25489102
Yang Yf; Pines D
Proc Natl Acad Sci U S A 2014[Dec]; 111 (51): 18178-82 PMID25489102show ga
Although the pairing glue for the unconventional superconductivity found in heavy-electron materials has been identified as quantum critical spin fluctuations associated with their proximity to antiferromagnetic order, until now we have lacked a simple expression for their superconducting transition temperature, Tc, that explains why Tc changes with pressure, or varies from one material to another. The experiment-based expression proposed here parameterizes the effective frequency-dependent quasiparticle interactions in terms of their unusual normal-state properties; it provides a quantitative explanation of the measured pressure-induced variation in Tc in the ?hydrogen atoms? of unconventional superconductivity, CeCoIn5 and CeRhIn5, predicts a similar pressure variation for other heavy-electron quantum critical superconductors, and quantifies their variations in Tc with a single parameter.