Related Experiment Video
Updated: May 9, 2026
06:49
Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
Published on: April 12, 2019
Superconducting anisotropy in (CaCuO2)n/(SrTiO3)m superlattices
M Salvato1, I Ottaviani, M Lucci
1Dipartimento di Fisica and MINAS LAB, Università di Roma Tor Vergata, I-00133 Roma, Italy. CNR-SPIN, Italy.
Summary
Superconducting anisotropy in artificial superlattices decreases with increasing structural anisotropy. This suggests interface doping, not layer separation, primarily influences superconducting properties.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Artificial superlattices offer tunable electronic properties.
- Understanding superconductivity in layered materials is crucial for novel applications.
Purpose of the Study:
- Investigate superconducting properties of (CaCuO2)n/(SrTiO3)m superlattices.
- Determine the relationship between structural and superconducting anisotropy.
- Elucidate the factors governing superconducting anisotropy.
Main Methods:
- Transport measurements under external magnetic fields.
- Measurement of coherence lengths (ξab and ξc) at varying SrTiO3 block thickness (m).
- Analysis of irreversibility lines and activation energy for fluxon motion.
Main Results:
- Superconducting anisotropy (γ = ξab/ξc) decreases as SrTiO3 block thickness (m) increases.
- Increased structural anisotropy leads to decreased superconducting anisotropy.
- Experimental data supports interface doping as the dominant factor.
Conclusions:
- Superconducting anisotropy is more sensitive to interfacial doping than to the separation between superconducting layers.
- Local doping at the interface plays a critical role in modulating superconducting behavior in these superlattices.
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