1993/12/22 by Menke U. Ubbens, Patrick A. Lee, Ubbens, Menke U. +1
Engineering · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed Matter (cond-mat) #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9312089
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arxiv created 1993/12/22 · openalex publication_date 1993/12/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We analyze the phase diagram of single and bi-layer cuprates using the gauge-field description of the t-J model. For T>TBE the in-plane fermion-pairing order parameter Δ\scriptscriptstyle∥ is eliminated by gauge field fluctuations, leading us to predict the absence of a spin-gap phase in single-layer cuprates. For bi-layer cuprates the inter-layer order parameter Δ_⊥ is enhanced by spin correlations, and is less affected by gauge fluctuations. We believe that the spin gap in bi-layer materials is due to inter-layer fermion pairing, and that for these underdoped samples the superconducting gap may be nodeless.