Point-contact spectroscopy of two-band superconductor MgB2
arXiv:cond-mat/0309693
Abstract
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 $Ï$ and three-dimensional $Ï$ 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.
invited talk at NATO ARW "Frontiers in Spectroscopy of Emergent Materials" 13 -19 Sept. 2003, Sudak, Ukraine, (16 pages., 7 figs.) will be published in Proceedings by Kluwer Acad. Publ