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SUMMARY:IMX Seminar Series - Topological Quasiparticles: Magnetic Skyrmion
 s
DTSTART:20201123T131500
DTEND:20201123T141500
DTSTAMP:20260506T084534Z
UID:3fca2c87ad38da8789b892ef473ff3cbf6fe65604e5b8ab8f5bf6b6d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Alex Hoffmann\, University of Illinois at Urbana-Champai
 gn\, USA\nMagnetic skyrmions are topologically distinct spin textures and 
 can be stable with quasi-particle like behavior.1  This makes them intere
 sting for information technologies\,2 where data is envisioned to be encod
 ed in topological charges\, instead of electronic charges as in convention
 al semiconducting devices.  Using magnetic multilayers we demonstrated th
 at inhomogeneous charge currents allow the generation of skyrmions at room
  temperature in a process that is remarkably similar to the droplet format
 ion in surface-tension driven fluid flows.3  Micromagnetic simulations re
 produce key aspects of this transformation process and suggest a second me
 chanism at higher currents that does not rely on preexisting magnetic doma
 in structures.4  Indeed\, we demonstrated this second mechanism experimen
 tally using non-magnetic point contacts.5  Using this approach\, we demon
 strated that the topological charge gives rise to a transverse motion on t
 he skyrmions\, i.e.\, the skyrmion Hall effect.6\n\nThis work was supporte
 d by the U.S. Department of Energy\, Office of Science\, Materials Science
 s and Engineering Division.\n\nReferences:\n\n	W. Jiang\, et al.\, Phys. R
 ep. 2017\, 704\, 1–49.\n	A. Hoffmann and S. D. Bader\, Phys. Rev. Appl. 
 2015\, 4\, 047001-1–047001-18\n	W. Jiang\, et al.\, Science 2015\, 349\,
  283–286.\n	O. Heinonen\, et al.\, Phys. Rev. B 2016\, 93\, 094407-1–0
 94407-6.\n	Z. Wang\, et al.\, Phys. Rev. B 2019\, 100\, 184426-1–184426
 -9.\n	W. Jiang\, et al.\, Nature Phys. 2017\, 13\, 162–169.\n\n\n 
LOCATION:Zoom https://epfl.zoom.us/j/95940364570
STATUS:CONFIRMED
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