Two-gap interplay in MgB2: a tunneling spectroscopy study
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| Title: | Two-gap interplay in MgB |
|---|---|
| Authors: | Roditchev, D.1, Giubileo, F.2 filgiu@sa.infn.it, Bobba, F.2, Lamy, R.1, Choi, E.-M.3, Kim, H.-J.3, Kang, W.N.3, Miraglia, S.4, Marcus, J.4, Sacks, W.1, Klein, J.1, Cucolo, A.M.2, Lee, S.-I.3, Fruchart, D.4 |
| Source: | Physica C. Aug2004, Vol. 408-410, p768-772. 5p. |
| Subjects: | Superconductivity, Tunneling spectroscopy, Thin films, Temperature |
| Abstract: | Tunneling spectroscopy on various samples of MgB2 was performed. The first direct evidence for the two-gap superconductivity was given with an inverted junction setup, in which a small crystal of MgB2 was used as the STM tip and 2H-NbSe2 as the sample. This technique allowed to show that both gaps close at the critical temperature of the bulk material and thus are intimately related to the superconductivity. The experiments performed in the standard N-I-S geometry evidenced for two strongly coupled gaps |
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| Database: | Engineering Source |
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