Advances in point-contact spectroscopy: two-band superconductor MgB2 (Review Article)

Автор(и)

  • I.K. Yanson B.Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
  • Yu.G. Naidyuk B.Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine

DOI:

https://doi.org/10.1063/1.1704612

Ключові слова:

PACS: 74.25.Fy, 74.80.Fp, 73.40.Jn

Анотація

Analysis of the point-contact spectroscopy (PCS) data on the new dramatic high-Tc superconductor magnesium diboride MgB2 reveals quite different behavior of two disconnected s and p electronic bands, deriving from their anisotropy, different dimensionality, and electron—phonon interaction. PCS allows direct registration of both the superconducting gaps and electron—phonon interaction spectral function of the two-dimensional s and three-dimensional p band, establishing correlation between the gap value and intensity of the high-Tc driving force — the E2g boron vibration mode. PCS data on some nonsuperconducting transition-metal diborides are surveyed for comparison.

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Опубліковано

2004-02-27

Як цитувати

(1)
Yanson, I.; Naidyuk, Y. Advances in Point-Contact Spectroscopy: Two-Band Superconductor MgB2 (Review Article):. Fiz. Nizk. Temp. 2004, 30, 355-372.

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