im Sommersemester 2005
Im Berliner Physikalischen Kolloquium im Magnus-Haus hat
Prof. Dr. Patrick Bruno,
Max-Planck-Institut für Mikrostrukturphysik, Halle,
vorgetragen.
Titel, Termin, Moderation und Ort
| Titel: | Effects of the Berry Phase in Magnetic Nanostructures |
| Termin: | Donnerstag, 12. Mai 2005, 18:30 Uhr |
| Moderation: | Wolfgang Nolting (HU Berlin) |
| Ort: | Magnus-Haus Am Kupfergraben 7 10117 Berlin |
Zusammenfassung
Spin-carrying particles (e.g., electrons) subject to a spacially non-uniform exchange (or Zeeman) field acquire a phase (know as the Berry phase) depending on the topology of the non-uniform exchange field. This effect is analogous to the Aharonov-Bohm phase acquired by a charged particle via its orbital motion in a magnetic vector potential. The Berry phase therefore leads to effects similar to those produced by a real magnetic field or vector potential. Such effects are currently the topic of intense research activeties in the field of magnetic nanostructures. In particular, I shall discuss the topological Hall effect due to the Berry phase, as well as spin-analogues of the Aharonov-Bohm interferences.
 | Kolloquium_20050512_02.pdf | 32 kB |