Quantum-critical superconductivity in underdoped cuprates

Ar Abanov, A. V. Chubukov, J. Schmalian

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


We argue that the pseudogap phase may be an attribute of the non-BCS pairing of quantum-critical, diffusive fermions near the antiferromagnetic quantum critical point. We derive and solve a set of three coupled Eliashberg-type equations for spin-mediated pairing and show that in some Τ range below the pairing instability, there is no feedback from superconductivity on fermionic excitations, and fermions remain diffusive despite of the pairing. We conject that in this regime, fluctuations of the pairing gap destroy the superconducting condensate but preserve the leading edge gap in the fermionic spectral function.

Original languageEnglish (US)
Pages (from-to)369-375
Number of pages7
JournalEurophysics Letters
Issue number3
StatePublished - Aug 1 2001


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