In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 40, No. 12B ( 2001-12-01), p. L1365-
Abstract:
We report the tunneling spectroscopy of non-oxide perovskite superconductor MgCNi 3 polycrystals using a low-temperature scanning tunneling microscope. The obtained tunneling spectra clearly show a superconducting energy gap structure, which can be well fitted by the BCS function with smearing parameter Γ. The value of the superconducting gap Δ is estimated to be 1.10–1.15 meV at 3 K, resulting in a ratio of 2Δ/ k B T c =3.3–3.4 for T c of 7.8 K. This result suggests that MgCNi 3 is a conventional BCS s-wave superconductor in the weak-coupling regime.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.40.L1365
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2001
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
