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.
@article{arxiv.cond-mat/0404476,
title = {Single-interface superconductivity in two-layer semiconductor heterostructures},
author = {N. Ya. Fogel and E. I. Buchstab and Yu. V. Bomze and O. I. Yuzephovich and M. Yu. Mikhailov and A. Yu. Sipatov and E. A. Pashitskii and R. I. Shekhter and M. Jonson},
journal= {arXiv preprint arXiv:cond-mat/0404476},
year = {2007}
}
Comments
4 pages, 4 figures; Revised version with more experimental data and improved text on their interpretation