Processes yielding high superconducting temperatures
M. T. Béal-Monod
DOI 10.1103/PhysRevB.36.8788 · Physical Review B
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Abstract
It is pointed out that any microscopic description of the new high-Tc superconductors should take into account a number of important points concerning strong couplings, whatever their nature: absence of the MacMillan limit, absence of a Migdal theorem, and importance of the Brovman-Kagan type of vertices with different singularities depending on the dimensionality. As a consequence, the applicability of standard techniques such as the Eliashberg theory, in particular, may be questioned in high-Tc superconductors.
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