Sample-size dependence of the superconducting transition of ribbon-shaped Pb nanocrystals studied by scanning tunneling spectroscopy
Ze-Lei Guan, Yan-Xiao Ning, Can-Li Song, Jian Wang, Jin-Feng Jia, Xi Chen, Qi-Kun Xue, Xucun Ma
DOI 10.1103/PhysRevB.81.054516 · Physical Review B
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Abstract
We have systematically investigated the superconductivity of single crystalline Pb nanoribbons grown on Si substrates by using low temperature scanning tunneling microscopy/spectroscopy. Superconductivity transition is observed in the nanoribbons with a width ∼10 nm and a thickness of 2.9 nm. By studying the width dependence of the superconducting parameters Tc and Hc2, a dimensional crossover between two dimensions and one dimension is identified.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.49 | Pressure not reported | onset |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.39 | Pressure not reported | onset |
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