Condensed-Matter Physics & Materials Science Seminar

Magneto-optical imaging provides a powerful tool to the study of vortex instabilities in superconductors. This talk will describe magneto-optical studies of various classes of vortex instabilities, focusing on generation and annealing of transient vortex states and the recently discovered spontaneous generation of vortex oscillation in Bi-Sr-Ca-Cu-O crystals. Both these phenomena are observed in the vicinity of the vortex order-disorder phase transition. The physical origin of these phenomena, and their relationship to the vortex phase transition, will be discussed.


Professor Yosef Yeshurun, Director of the Superconductivity Institute and Head of the Center for Magnetic Measurements, completing his university education in Israel, continued with advanced post-doctoral research at the University of Illinois, Urbana-Champaign, and returned to Bar-Ilan University as a tenured member at the Department of Physics. In this Department he set up a unique laboratory for magnetic measurements, undertaking a range of experimental solid-state research studies in a number of fields, such as one-dimensional organic conductors, spin glasses, amorphous metals and superconductors.

Prof. Yeshurun has had close scientific ties with universities and research institutes in Israel and throughout the U.S.A., France, Germany, Denmark, and Japan. He spent a sabbatical at the IBM research laboratories at Yorktown Heights, and was a visiting professor at research institutes in the U.S.A., Denmark, and France.

HOST: IVAN BOZOVIC EXT: 4973