Abstract
We report NMR measurements of narrow-gap Te alloys in the range x=0.20–0.28. By studying temperature dependences, we have identified intrinsic Knight shifts in these alloys. This provides a measure of Hg orbital contributions to conduction-electron states, and we find a consistently strong average contribution from Hg s orbitals. Furthermore, we identify local variations in the Knight shift with spatial variations in conduction-electron densities and symmetries. These characteristics have been related to randomly populated sites within the alloys. We also discuss chemical shifts and their relation to local orbital charges.
- Received 11 May 1993
DOI:https://doi.org/10.1103/PhysRevB.48.8742
©1993 American Physical Society