Accession Number:
AD0712072
Title:
THE SECOND ENERGY GAP IN SUPERCONDUCTING NIOBIUM.
Descriptive Note:
Technical rept.,
Corporate Author:
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF METALLURGY AND MATERIALS SCIENCE
Personal Author(s):
Report Date:
1970-09-24
Pagination or Media Count:
29.0
Abstract:
Low temperature tunneling studies of high purity single crystals of niobium indicate the existence of two energy gaps, delta sub s and delta sub d, one for each of the two bands lying at the Fermi level. The value of delta sub s i approximately delta sub d19. The crystallographic dependence of delta sub s indicates that delta sub s does not appear in directions where there is no s-d overlap at E sub F. The behavior of delta sub s with temperature and magnetic field indicate that interband coupling is significant in niobium. The results are compared to current theories of multiband superconductivity.
Descriptors:
Subject Categories:
- Solid State Physics