1999/12/03 by Dirk Manske, D. Manske, T. Dahm +4
Engineering · Physics and Astronomy · #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #Strongly Correlated Electrons (cond-mat.str-el) #Superconducting Materials and Applications #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/9912062
4 pages, 5 figures. One reference added
openalex publication_date 1999/12/03 · arxiv created 1999/12/14 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study Cooper-pair phase fluctuations in cuprate superconductors for a spin fluctuation pairing interaction. Using an electronic theory we calculate in particular for the underdoped cuprate superconductors the superfluid density ns(T), the superconducting transition temperature Tc(x) ∝ ns below which phase coherent Cooper-pairs occur, and Tc*(x) where the phase incoherent Cooper-pairs disappear. Also we present results for the penetration depth λ(x,T) and for the weak pseudogap temperature T*(x) at which a gap structure occurs in the spectral density. A Meißner effect is obtained only for T < Tc. We find that phase fluctuations become increasingly important in the underdoped regime and lead to a reduction of Tc in good agreement with the experimental situation.