Spatially heterogeneous character of superconductivity in MgB2 as revealed by local probe and bulk measurements

T. Ekino, A. M. Gabovich, Mai Suan Li, T. Takasaki, A. I. Voitenko, Jun Akimitsu, H. Fujii, T. Muranaka, M. Pekala, H. Szymczak

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Controversial tunnel and point-contact experimental data on superconducting gap values in MgB2 are analyzed and interpreted in terms of the spatial inhomogeneity and the proximity effect appropriate to this layered compound. Existing specific heat measurements are explained in the same way. Break-junction tunnel studies of polycrystalline MgB2 samples are carried out and a clear-cut multiplicity of gaps is observed, although the shapes of the I-V characteristics vary substantially.

Original languageEnglish
Pages (from-to)230-233
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume426-431
Issue numberI
DOIs
Publication statusPublished - Oct 1 2005
Externally publishedYes

Fingerprint

Thermal variables measurement
Tunnel junctions
Point contacts
Superconductivity
Specific heat
Tunnels
superconductivity
probes
tunnel junctions
tunnels
inhomogeneity
heat measurement
specific heat

Keywords

  • Break junction
  • Heat capacity
  • MgB
  • Tunnel spectra

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Spatially heterogeneous character of superconductivity in MgB2 as revealed by local probe and bulk measurements. / Ekino, T.; Gabovich, A. M.; Li, Mai Suan; Takasaki, T.; Voitenko, A. I.; Akimitsu, Jun; Fujii, H.; Muranaka, T.; Pekala, M.; Szymczak, H.

In: Physica C: Superconductivity and its Applications, Vol. 426-431, No. I, 01.10.2005, p. 230-233.

Research output: Contribution to journalArticle

Ekino, T, Gabovich, AM, Li, MS, Takasaki, T, Voitenko, AI, Akimitsu, J, Fujii, H, Muranaka, T, Pekala, M & Szymczak, H 2005, 'Spatially heterogeneous character of superconductivity in MgB2 as revealed by local probe and bulk measurements', Physica C: Superconductivity and its Applications, vol. 426-431, no. I, pp. 230-233. https://doi.org/10.1016/j.physc.2005.03.029
Ekino, T. ; Gabovich, A. M. ; Li, Mai Suan ; Takasaki, T. ; Voitenko, A. I. ; Akimitsu, Jun ; Fujii, H. ; Muranaka, T. ; Pekala, M. ; Szymczak, H. / Spatially heterogeneous character of superconductivity in MgB2 as revealed by local probe and bulk measurements. In: Physica C: Superconductivity and its Applications. 2005 ; Vol. 426-431, No. I. pp. 230-233.
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