Study of Mg B2 IPb tunnel junctions on MgO (211) substrates

Ke Chen, Y. Cui, Qi Li, C. G. Zhuang, Zi-kui Liu, X. X. Xi

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Abstract

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 [111] 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.

Original languageEnglish (US)
Article number012502
JournalApplied Physics Letters
Volume93
Issue number1
DOIs
StatePublished - Jul 21 2008

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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