Solid State Structure and Electronic Properties of A Mixed-Valence Two-Dimensional Metal, KCu4S3.
Abstract
KCu4S3, prepared by the high temperature reaction of copper, potassium carbonate, and sulfur, crystallizes with a unique layered structure. Double layers of tetrahedrally - coordinated (by S) copper ions are separated by layers of potassium ions. Although formally a mixed-valence Cu(I,I,I,II) complex, all copper ions are crystallographically equivalent. Consistent with its Robin and Day Class III designation, KCu4S3 exhibits electrical conductivity characteristic of a metal. Room temperature compaction conductivities of ca. 4000/Ohm/cm increase to ca. 60000/Ohm/cm at 20K. The metallic nature of this two-dimensional material is supported by the temperature independent paramagnetism and the metallic reflectivity through the visible and near ultraviolet region of the spectrum. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 28, 1980
- Accession Number
- ADA080624
Entities
People
- David B. Brown
- James T. Wrobleski
- Jon A. Zubieta
- P. A. Vella
- Timothy Watt
Organizations
- University of Vermont