Strong-coupling effects on the temperature dependence of penetration depth in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thin films near T{sub c}

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.7874· OSTI ID:632588

Andreone, A; Cantoni, C; Cassinese, A; Di Chiara, A; Vaglio, R ^[1]

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1. INFM, Dipartimento di Scienze Fisiche, Universitadegli Studi di Napoli Federico II, Napoli (Italy)

We present accurate experimental data on the temperature dependence of the penetration depth {lambda} in c-axis-oriented YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thin films close to T{sub c}. The samples were grown {ital in situ} on LaAlO{sub 3} (100) single-crystal substrates. The penetration depth measurements are performed by an inverted microstrip method, using resonators of different geometries. Near T{sub c} we compare the three-dimensional (3D) XY critical regime and the Ginzburg-Landau (GL) behavior. Our data show that the GL approach follows the observed temperature dependence closer than the 3D XY model. The experimental results are discussed in the light of recent models describing the effect of strong coupling on the {lambda}(T) behavior near T{sub c} for an s-wave and a d-wave high-temperature superconductor. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 632588
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 13 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
COUPLING
GINZBURG-LANDAU THEORY
HIGH-TC SUPERCONDUCTORS
PENETRATION DEPTH
SUPERCONDUCTING FILMS
THIN FILMS
TRANSITION TEMPERATURE
YTTRIUM OXIDES