Superconducting and Normal State Properties of Hexagonal Cesium Tungsten Bronze.
Abstract
The chemical potential, Seebeck coefficient, metallic resistivity, superconducting transition temperature, and superconducting upper critical field of single crystals of hexagonal Cs sub x WO3 (0.19 or = x or = 0.33) were measured. The data show that correlations exist among these various properties and between the properties and the Cs concentration (as determined by X-ray fluorescence) of the sample crystals. While certain of the normal state variations can be explained in terms of the change in charge carrier concentration with x-value, the unusual behavior of rho near x = 0.24 and the overall enhancement of the superconducting properties with decreasing x lend credence to a more lattice-related model, in which the increasing vacancies produced by decreasing Cs content affect electron-phonon coupling.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1978
- Bibcode:
- 1978PhDT........91S
- Keywords:
-
- Physics: Condensed Matter;
- Bronzes;
- Cesium Alloys;
- Electrical Properties;
- Single Crystals;
- Superconductivity;
- Tungsten Alloys;
- Anisotropy;
- Concentration (Composition);
- Crystal Lattices;
- Seebeck Effect;
- Semiconductors (Materials);
- X Ray Fluorescence;
- Solid-State Physics