A New Approach to Understanding the Semiconductor Surface and Interfaces
Abstract
We have extended our application of electron spin resonance for the study of the silicon metal interface to include Gold, Aluminum, and Silver overlays. We present representative data for the observed broadening of the ESR linewidth for each of these metals applied to the silicon surface. As can be seen from these data, whereas strong spin coupling was found for Au and Al (comparable to our earlier results for Cu), we found no evidence of coupling for Ag. We believe these differences illustrate the specificity of the Silicon metal atom bond at the interface, whose quantitative measure is one of the goals of this research. We are now in the process of completing the dedicated UHV in-situ ESR system that will enable us to make the desired measurements of the Si-metal coupling at the submonolayer coverage level. We have continued to search for ESR signals in the new high Tc superconductors, and also to apply the low field microwave absorption technique for the purposes of discovering new high Tc materials. In particular we have improved the sensitivity of our technique such that we are readily able to detect superconductivity in single crystals as small as .000001 gm. Preprints of articles reporting this effort are enclosed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 31, 1988
- Accession Number
- ADA200131
Entities
People
- Sheldon Schultz
Organizations
- University of California, San Diego