2004/05/12 by I. K. Yanson, Yanson, I. K.
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Superconductivity (cond-mat.supr-con) #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0405246
6 pages, 6 figures. Proc. NATO Advanced Research Workshop on New Challenges in Superconductivity, January 2004, Miami, USA
arxiv created 2004/05/12 · arxiv updated 2009/12/01
In strong-coupling superconductors with a short electron mean free path the self-energy effects in the superconducting order parameter play a major role in the phonon manifestation of the point-contact spectra at above-gap energies. We compare the expressions for the nonlinear conductivity of tunnel, ballistic, and diffusive point-contacts and show that these expression are similar and correspond to the measurements of the phonon structure in the point-contact spectra for the π-band of MgB2.