Superconductivity in ultrathin quench-condensed Pb/Sb and Pb/Ge multilayers
P. Xiong, A. V. Herzog, R. C. Dynes
DOI 10.1103/PhysRevB.52.3795 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We present the results of in situ transport and tunneling measurements on quench-condensed Pb/Sb and Pb/Ge multilayers. The superconducting transition temperature (Tc) and the density of states increase concurrently with the number of Pb layers (n) and eventually saturate. Both the variation of Tc with n and the saturated value of Tc can be accounted for by electron transfer between Pb layers through localized states in the Sb(Ge). We find that the basic mechanism for superconductivity in these multilayers is not fundamentally altered from that in homogeneous amorphous superconducting films. Our results clarify the role the Ge or Sb underlayer and overlayer plays in the transport and superconductivity of uniform quench-condensed films.
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. | 5.3 | Pressure not reported | midpoint |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.2 | Pressure not reported | unknown |
Similar papers
Thermal suppression of surface barrier in ultrasmall superconducting structures
similarity 0.97W. V. Pogosov
Source status unknown — claims are unverified
Two-band superconductivity in Pb from ab initio calculations
similarity 0.96A. Floris et al.
Source status unknown — claims are unverified
Superconductor-insulator transition in ultrathin Pb films: Localization and superconducting coherence
similarity 0.96K. Kagawa et al.
Source status unknown — claims are unverified
Direct investigations of the superconducting surface sheath and nonlocal electrodynamics by polarized neutron reflections
similarity 0.96K. E. Gray et al.
Source status unknown — claims are unverified
Investigation of specific heat in ultrathin two-dimensional superconducting Pb
similarity 0.96T. D. Nguyen et al.
Source status unknown — claims are unverified
Hyper-resistivity to global-superconductivity transition by annealing in quench-condensed Pb films
similarity 0.96R. P. Barber, Jr. & R. E. Glover, III
Source status unknown — claims are unverified