Dense single-atomic 14×3-reconstructed Pb layer on Si(111): Structural and superconducting properties
L. V. Bondarenko, A. Y. Tupchaya, Y. E. Vekovshinin, D. V. Gruznev, Tatiana V. Utas, A. N. Mihalyuk, N. V. Denisov, A. V. Zotov, A. A. Saranin
DOI 10.1103/PhysRevB.108.115428 · Physical Review B
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Abstract
A highly ordered, Pb-dense 14×3-Pb overlayer was grown on Si(111) using the two-step procedure with formation of the 7×3−Pb surface [displaying the 1×1 structure at room temperature (RT)] at the first step and RT deposition of additional Pb at the second step until formation of the 14×3−Pb phase with 1.286 monolayers of Pb is completed. The single-domain orientation of the 14×3−Pb layer persists along the entire surface of the terraces which are typically as wide as dozens of nanometers and in the selected areas might exceed a hundred nanometers. The 14×3−Pb phase hosts the superconductivity with the critical temperature Tc=2.08 K which exceeds all ever reported values for the single-atom Pb layers on Si(111).
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. | 2.08 | Pressure not reported | onset |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.83 | Pressure not reported | unknown |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.1 | Pressure not reported | unknown |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.25 | Pressure not reported | unknown |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.51 | Pressure not reported | unknown |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.21 | Pressure not reported | unknown |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.52 | Pressure not reported | unknown |
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