Accession Number : AD0718415

Title :   Investigation of the Superconducting Energy Gap Behavior of Single Crystal Rhenium by Tunneling.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF METALLURGY AND MATERIALS SCIENCE

Personal Author(s) : Ochiai,Shin I. ; MacVicar,Margaret L. A. ; Rose,Robert M.

Report Date : 03 FEB 1971

Pagination or Media Count : 35

Abstract : A 15.7% anisotropy in the superconducting energy gap has been measured by electron tunneling into single crystals of rhenium, using thin carbon films as the tunneling barrier to form Re-C-In sandwiches. The energy gap behavior with temperature is BCS-like. The anisotropy agrees with ultrasonic measurements of other hcp metals and suggests that phonon dispersion plays a dominating role in the gap behavior. However, gap values determined from multiparticle tunneling data exhibited reduced gap magnitudes, and a dissimilar crystallographic behavior. (Author)

Descriptors :   (*SUPERCONDUCTORS, *RHENIUM), (*TUNNELING(ELECTRONICS), SUPERCONDUCTORS), SINGLE CRYSTALS, TRANSITION TEMPERATURE, BAND THEORY OF SOLIDS, ANISOTROPY, CARBON, PHONONS

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE