Strong coupling superconductivity in heavy fermion systems
作者： L Glémot , J.P Brison , J Flouquet , A.I Buzdin , D Jaccard
DOI: 10.1016/S0921-4534(99)00046-5
关键词: Superconductivity 、 Constant (mathematics) 、 Condensed matter physics 、 Physics 、 Strong coupling 、 Heavy fermion 、 Pressure dependence 、 Renormalization 、 Critical field 、 Pairing
摘要: Abstract One of the primary interests heavy fermion superconductivity, besides possible unconventional order parameters, is possibility a non-phonon-mediated pairing mechanism. It has proved nevertheless very difficult to find an experimental probe this hypothesis. The upper critical field, H c 2 , UBe 13 revealed that compound was in extreme strong coupling regime, characterized by constant λ ≈15. We present pressure measurements c2 which dependence . main result compound, mechanism also responsible for large part mass renormalization and cannot arise from electron–phonon interactions. will be discussed framework actual interpretations masses systems contrasted with other superconductors.
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