Evidence for two-band superconductivity from break-junction tunneling on MgB{sub 2}.
Journal Article
·
· Phys. Rev. Lett.
Superconductor-insulator-superconductor tunnel junctions have been fabricated on MgB{sub 2} that display Josephson and quasiparticle currents. These junctions exhibit a gap magnitude, {Delta}{approx}2.5 meV, that is considerably smaller than the BCS value, but which clearly and reproducibly closes near the bulk {Tc}. In conjunction with fits of the conductance spectra, these results are interpreted as direct evidence of two-band superconductivity.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 949347
- Report Number(s):
- ANL/MSD/JA-40188
- Journal Information:
- Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: 12 ; Mar. 25, 2002 Vol. 88; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- ENGLISH
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