Scaling between localization length and {Tc} in disordered YBa{sub 2}Cu{sub 3}O{sub 6.9}
The authors quantitatively study the effect of growth-induced reduction of long range structural order on the superconducting transition in epitaxial YBa{sub 2}Cu{sub 3}O{sub 6.9} films. The corresponding reduction of structural coherence length r{sub c} is determined from the width of X-ray diffraction rocking curves. {Tc} measurements in the films give evidence for the validity of the empirical scaling relation {Delta}{Tc} {approximately} r{sub c,ab}{sup {minus}2}, where {Delta}{Tc} is the disorder-induced reduction of {Tc} and r{sub c,ab} is the structural coherence length in the ab-plane. To explain this algebraic law the authors propose a simple phenomenological model based on the disorder-induced localization of the charge carriers within each ordered domain of size r{sub c,ab}. This picture enables them to precisely determine the Ginzburg-Landau superconducting coherence length in the ab-plane, and they obtain {xi}{sub ab} = 1.41 {+-} 0.04 nm.
- Research Organization:
- Consiglio Nazionale delle Ricerche, Parma (IT)
- OSTI ID:
- 20015136
- Journal Information:
- International Journal of Modern Physics B, Vol. 13, Issue 29-31; Conference: Second International Conference of New Theories, Discoveries and Applications of Superconductors and Related Materials (New{sup 3}SC-2), Las Vegas, NV (US), 06/01/1999; Other Information: PBD: 20 Dec 1999; ISSN 0217-9792
- Country of Publication:
- United States
- Language:
- English
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