Condensed Matter Physics Seminar

2 p.m., Thursday, May 10, 2001
Room 1201, Physics Building

 Superconductivity in MgB2

Igor Mazin

(Center for Computational Materials Science, Naval Research Laboratory, Washington, DC)

Abstract:  I will describe current experimental and theoretical situation with the superconductivity in magnesium diboride.  Lacking single crystals, little can be said about the mechanism with definiteness.  However, most of the results agree with an s-wave phonon-induced superconductivity.  Nevertheless, there are indications that the actual physics is richer than one may expect.  There are both experimental and theoretical evidences of substantial anisotropy of the order parameter, and even claims of gap nodes.  Also, theoretical calculations suggest that nonlinear electron-phonon interaction (i.e., two-phonon exchange) may play a considerable role.
Host:  Victor Yakovenko
Back to Condensed Matter Physics Seminar Home Page