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Letter
Nature Physics 4, 603–607 (1 August 2008) | doi:10.1038/nphys1002
Superconductivity and quantum criticality in the heavy-fermion system |[beta]|-YbAlB4
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Abstract
A long-standing question in the field of superconductivity is whether pairing of electrons can arise in some cases as a result of magnetic interactions instead of electron–phonon-induced interactions as in the conventional Bardeen–Cooper–Schrieffer theory. A major challenge to the idea of magnetically mediated superconductivity has been the dramatically different behaviour of the cerium and ytterbium heavy-fermion compounds.
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