Electron tunneling measurement of the energy gap in a LaSrCuO superconductor

✍ Scribed by J Moreland; A.F Clark; H.C Ku; R.N Shelton

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 120 KB
• Volume: 27
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(87)90027-0

✦ Synopsis

We have used the break junction technique to determine the energy gap of lanthanumstrontium-copper-oxide, one of the new high critical temperature superconductors. The current-voltage characteristics demonstrated a variety of tunneling behaviours. The best characteristic indicating quasiparticle tunneling between superconducting electrodes implied an energy gap of 7.0 _ 0.1 meV. Derivatives of other characteristics showed weak structure indicating possible energy gaps up to 9 meV.