2004/01/31 by Igor F. Herbut, Matthew Case, Matthew J. Case · 3 citations
Engineering · Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.70.094516
published as Physical Review B, vol. 70, 094516 (2004). · 5 RevTex pages, 4 figures (one new); more discussion and comparison with experiment; version to appear in Phys. Rev. B
arxiv created 2004/08/10 · openalex publication_date 2004/09/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The combination of a large gap, low transition temperature, and quasi-two-dimensionality in strongly underdoped high-temperature superconductors severely constrains the behavior of the ab-plane superfluid density \ensuremathρ with temperature T. In particular, we argue that the contribution of nodal quasiparticles to \ensuremathρ(T) is essential to account both for the amplitude of, and the recently observed deviations from, the Uemura scaling. A relation between Tc and \ensuremathρ(0) which combines the effects of quasiparticle excitations at low temperatures and of vortex fluctuations near critical temperature is proposed and discussed in light of recent experiments.