Superconductivity at the Surface of Lead Telluride,
Abstract
Ultrathin films of the metals Pb, In, Tl, Sn, and Al were deposited on crystalline PbTe substrates in an attempt to fabricate a system favorable for the observation of an excitonic mechanism of superconductivity. For each of these metals, superconductivity was observed at the PbTe surface. A threshold amount of metal deposited was necessary for superconductivity, and the observed transition temperatures increased as the amount of metal deposited increased beyond the threshold amount. Maximum values of the observed T's at thicknesses less than 100A were 6.75K for In, about 5.25K for Tl, 7.15K for Pb, 3.4K for Sn, and 2.6K for Al. The PbTe substrate surface and the metal overgrowth were characterized by the use of low energy electron diffraction and Auger electron spectroscopy. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1973
- Accession Number
- AD0776144
Entities
People
- David Lee Miller
Organizations
- University of Illinois Urbana–Champaign