Accession Number : AD0698271

Title :   AN INVESTIGATION OF LOW ENERGY STRUCTURE IN NIOBIUM SINGLE CRYSTALS BY TUNNELING.

Descriptive Note : Technical rept.,

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

Personal Author(s) : Hafstrom,John W. ; Rose,Robert M.

Report Date : NOV 1969

Pagination or Media Count : 72

Abstract : An investigation of low energy superconductive tunneling into very pure single crystal niobium was performed. Lead and indium films, evaporated onto oxide barriers, were used as the probe. Evidence was found for a second energy gap in niobium at delta/10. The gap is temperature independent and agrees with various theoretical predictions. Additional new voltage structure is found in junctions formed with lead, indicative of tunneling processes occurring within the barrier. Various processes are proposed to explain the structure. (Author)

Descriptors :   (*SUPERCONDUCTORS, BAND THEORY OF SOLIDS), (*NIOBIUM, *TUNNELING(ELECTRONICS)), SINGLE CRYSTALS, INDIUM, LEAD(METAL), INTERFACES, CRYOGENICS

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE