Dresden 2017 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 15: Ferroics - Domains, Domain Walls and Skyrmions III
DF 15.4: Vortrag
Mittwoch, 22. März 2017, 16:00–16:15, WIL B321
Modeling domain wall dynamics in multiferroic hexagonal manganites — Xiaoyu Wu1, Urko Petralanda2, Lu Zheng1, Yuan Ren1, Rongwei Hu3, Sang-Wook Cheong3, •Sergey Artyukhin2, and Keji Lai1 — 1Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA — 2Quantum Materials Theory, Istituto Italiano di Tecnologia, Genova, Italy — 3Rutgers Center for Emergent Materials and Department of physics and Astronomy, Rutgers University, Piscataway, NJ 08854
Multiferroic materials with coexisting magnetic and ferroelectric orders hold promise for the manipulation of magnetism by applied electric fields. These effects were demonstrated [1] to be controlled by the dynamics of strongly interacting domain walls of different types. We report on modeling the electric field - driven dynamics of ferroelectric domain walls in hexagonal manganites, where ferroelectric polarization is produced due to condensation of a trimerization mode [2]. The dynamics is studied using a tight-binding model with parameters derived from first-principles calculations.
[1] Y. Tokunaga et al. Nature Materials 8, 558 (2009) [2] S. Artyukhin, K.T. Delaney, N.A. Spaldin, and M. Mostovoy, Nature Materials 13, 42 (2014) [3] C. J. Fennie and K. M. Rabe, Phys. Rev. B 72, 100103(R) (2005)