Pseudogaps and the spin-bag approach to high-Tc superconductivity
A. Kampf, J. R. Schrieffer
DOI 10.1103/PhysRevB.41.6399 · Physical Review B
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Abstract
It is shown that antiferromagnetic spin fluctuations in a two-dimensional metal, such as heavily doped cuprate superconductors, lead to a pseudogap in the electronic spectrum. The spectral function evolves from one peak in the Fermi-liquid regime to two peaks, one for particles and one for holes. The self-energy of spin bags and their pairing interaction are calculated. These results are consistent with the corresponding results in the weakly doped ordered antiferromagnet.
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