Cooper pairs as low-energy excitations in the normal state

preprint1997arXivOpen access

Abstract

We discuss the normal state of a fermionic system in an idealized PSEUDOGAP REGIME, kBTc<kBT<<∣Δ∣<<EFk_B T_c < k_B T << |Δ| << E_F. Stable Cooper pairs induce a pseudogap of width ∣Δ∣|Δ| in the fermion energy spectrum. Near two dimensions, we find a Bose-like condensation temperature in this predominantly fermionic system.

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