ELFT HÍRADÓ

[Edina Szirmai <eszirmai AT phy.bme.hu>]

                                  MEGHÍVÓ

az MTA-BME "Egzotikus Kvantum Fázisok" kutatócsoport és
az MTA-BME "Magneto-optikai Spektroszkópia" kutatócsoport
                         közös szemináriumára


                              Andrey O. Leonov
              (Zernike Institute for Advanced Materials,
                          University of Groningen)


                   Skyrmions in frustrated magnets



Kivonat:

Magnetic skyrmions are novel topological defects with unusual physical
properties. They have been recently observed in helimagnets with a
non-centrosymmetric cubic lattice. Magnets with competing spin
interactions form a new class of materials where skyrmions can be found
[1]. Statical and dynamical properties of skyrmions in frustrated magnets
are much richer than those of skyrmions in helimagnets.  Frustrated
skyrmions have topological charge 1 and 2, arbitrary sign of vorticity and
an arbitrary helicity angle. The strong inter-skyrmion attraction gives
rise to their clustering in high magnetic fields and topological skyrmion
liquids at nonzero temperatures. Skyrmion crystals and other multi-*q*
states in the model with competing exchange interactions on a triangular
lattice result from the easy axis anisotropy. This model has a very rich
phase diagram, which has been studied using Monte-Carlo simulations.

[1] http://xxx.lanl.gov/abs/1501.02757


Az előadás helye:  BME F III. épület, mfsz, szemináriumi szoba.
Ideje: 2015. április 13. hétfő, 14:15.

Minden érdeklődőt szeretettel várunk!

                       Szirmai Edina



-- 
Edina Szirmai
Department of Theoretical Physics,
Budapest University of Technology and Economics
Budafoki ut 8.
Budapest, Hungary
Tel:(+36-1) 463-4107
Fax:(+36-1) 463-3567
www.phy.bme.hu/~eszirmai