BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Jiadong Zang\, Johns Hopkins University\n\n
\n A Skyrmion is a topological configuration in which local spins wrap around the unit sphe re for an integer number of times. After decades of theoretical discussion s in high energy physics\, it has been recently observed in a series of no n-centrosymmetric chiral magnets. Several experiments by neutron scatterin g or transmission electron microscopy confirm the presence of skyrmions in a crystalline state at a finite window of magnetic field and temperature. Skyrmions show various novel properties inherent to its topological natur e\, such as topological Hall effect\, topological stability\, and ultralow critical current for movement\, which offer the skyrmion promising prospe cts for next generation spintronic devices and information storage.
\n< p>\n In this talk\, I will explain the physical origin of skyrmions in chi ral magnets\, and discuss their dynamics under electric current or tempera ture gradient\, where an emergent electromagnetism plays an important role . Furthermore\, several routes to single skyrmions will be presented\, and new chiral magnet materials are discussed.\n DTSTART:20150402T193000Z LOCATION:Physics Building\, Room 204 SUMMARY:Skyrmions in Helimagnets END:VEVENT END:VCALENDAR