Point-contact spectroscopy of two-band superconductor MgB2

Details Point-contact spectroscopy of two-band superconductor MgB2 Point-contact spectroscopy of two-band superconductor MgB2

2003-09-30

arxiv.org/abs/cond-mat/0309693v1

in "Spectroscopy of Emerging Materials", ed. by Eric C. Faulques, Dale L. Perry, Andrei V. Yeremenko (Kluwer Academic Publishe

Physics

Condensed Matter

Superconductivity

invited talk at NATO ARW "Frontiers in Spectroscopy of Emergent Materials" 13 -19 Sept. 2003, Sudak, Ukraine, (16 pages., 7 fi

Scientific paper

The progress in investigation of two-band superconductor MgB$_2$ by the point-contact spectroscopy (PCS) is given. Results of study of superconducting gap temperature and magnetic field dependence for two-dimensional $\sigma$ and three-dimensional $\pi$ band and electron-phonon-interaction spectral function are presented. Correlation between the gap value and the intensity of the high T$_c$ driving force -- $E_{2g}$ boron vibration mode, is provided. PCS data on some nonsuperconducting transition metal diborides are surveyed for comparison.

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