Mg B2 insulatorPb tunnel junctions have been made using Mg B2 films on MgO (211) substrates. The c axis of the bottom electrode Mg B2 film, parallel to the MgO  direction, was tilted with respect to the film normal, exposing the ab planes for electron tunneling. Tunneling contributions from both the and π bands were present in the tunneling spectra. The temperature and the magnetic field dependences of both gaps were studied, shedding light on the two-gap properties of Mg B2.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)