Direct evidence for interfacial superconductivity in two-layer semiconducting heterostructures
N. Ya. Fogel, E. I. Buchstab, Yu. V. Bomze, O. I. Yuzephovich, M. Yu. Mikhailov, A. Yu. Sipatov, E. A. Pashitskii, R. I. Shekhter, M. Jonson
DOI 10.1103/PhysRevB.73.161306 · Physical Review B
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Abstract
We have discovered superconductivity in the two-layer semiconducting monochalcogenide heterostrutures PbTe∕PbS, PbTe∕PbSe and PbTe∕YbS. By comparing data from two-layer samples with data from single monochalcogenide films we conclude that the superconductivity is connected with the interface between the two semiconductors. Evidence for the low dimensional nature of the superconducting interlayer is presented and a model that explains the appearance of single-interface superconductivity is proposed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PbTe/PbS Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.6 | Pressure not reported | midpoint |
| PbTe/PbSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.6 | Pressure not reported | midpoint |
| PbTe/YbS Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.6 | Pressure not reported | midpoint |
| PbS/PbSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.4 | Pressure not reported | unknown |
| PbS/YbS Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.4 | Pressure not reported | unknown |
| PbSe/EuS Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.4 | Pressure not reported | unknown |
| PbTe/SnTe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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