Stockholm physics colloquium
Prof. I. K. Yanson B.Verkin Institute for Low Temperature Physics
and Engineering of the National Academy of Sciences of Ukraine,
Thursday, October 21, 15.15
Oskar Klein auditorium, AlbaNova main building, level 4
A new type of spectroscopy, Point-Contact Spectroscopy, was created
for the study of conduction electron interaction mechanism with
a class of elementary excitations in solids. The physical principles
of spectroscopy of quasi-particle excitations in metals at low temperatures
by means of point contacts are presented. The point contact constitutes
a tiny metallic bridge connecting bulk electrodes. We restrict ourselves
by the most thoroughly studied phonon excitations, briefly mentioning
the interaction of electrons with other quasiparticles (magnons,
crystal-field electron excitations, paramagnetic impurities, two-level
systems, etc). Various experimental techniques for point contact
production are described. Examples of point-contact spectra are
presented for pure metals, alloys and compounds, as well as some
examples for semimetals and superconductors.
About the speaker: Prof. Yanson is a full member elect of the Ukrainian
Academy of Sciences since 1992. His contributions to the field have
been recognized by, among other awards, the Hewlett-Packard European
Physical Society Prize for the “Discovery and exploitation
of point-contact spectroscopy in metals” (1987).
Coffee will be served before the talk.
Claes Fransson, Jouko Mickelsson,
Lektor i Stockholm
Nordic-Math-Job number: SE-0616
University: Stockholms universitet
Department: Matematiska institutionen
Position: Universitetslektor i matematik
Deadline: 5 november 2004
Clas Löfwall, 08 - 16 45 16, firstname.lastname@example.org,
Bibi Pehrson, 08 - 16 22 92, email@example.com.