TOPO 2019

Main topics

Domains and domain walls
Skyrmions and chiral spin textures
Vortex, anti-vortex and vertex structures in ferroics
Nanoelectronics using domain wall logic
Spin torque, spin waves and spintronics
Nanoscale characterisation of ferroics
Topological defects in ferroelectrics, ferromagnets, multiferroics, and liquid crystals
Topological structures in soft matter, biology, etc.

Invited speakers

Fumito Araoka, Riken, Japan
Hans–Benjamin Braun, Dublin Institute for Advanced Studies, Ireland
Andres Cano, CNRS, Grenoble, France
Gustau Catalan, Catalan Institute of Nanoscience and Nanotechnology, Barcelona, Catalonia
Salia Cherifi Hertel, IPCMS University of Strasbourg, France
Sinisa Coh, University of California, Riverside, USA
Pavel Dolganov, Institute of Solid State Physics, Chernogolovka, Russia
Lukas Eng, Technische Universität Dresden, Germany
Olena Gomonay, Johannes Gutenberg – University, Germany
Sinead Griffin, Lawrence Berkeley National Laboratory, USA
Anna Grünebohm, University of Bochum, Germany
Colin Heikes, NIST Center for Neutron Research, USA
Petr Jizba, Czech Technical University, Czech Republic
Tomas Jungwirth, Czech Academy of Sciences, Czech Republic
Istvan Kezsmarki, Uni-Augsburg, Germany
Mathias Kläui, Johannes Gutenberg – University, Germany
Samo Kralj, Jožef Stefan Institute, Ljubljana, Slovenia
Volodymyr Kravchuk, Leibniz Institute for Solid State and Materials Research, Dresden, Germany
Ho Nyung Lee, Oak Ridge National Laboratory, USA
Céline Lichtensteiger, University of Geneva, Switzerland
Alois Loidl, University of Augsburg, Germany
Igor Lukyanchuk, University of Picardy, France
Masahito Mochizuki, Waseda University, Tokyo, Japan
Tae Won Noh, Seoul National University, South Korea
Teruo Ono, Kyoto University, Japan
Christian Pfleiderer, Technische Universität München, Germany
Ramamoorthy Ramesh, UC Berkeley, USA
Ray Rivers, Imperial College, UK
Filipp Rybakov, KTH - Royal Institute of Technology, Stockholm, Sweden
Ekhard Salje, University of Cambridge, Cambridge, UK
Avadh Behari Saxena, Los Alamos National Laboratory, USA
Wilfried Schranz, University of Vienna, Austria
Jan Seidel, University of New South Wales, Sydney, Australia
Vladimir Shur, Ural University, Russia
Ivan Smalyukh, University of Colorado Boulder, USA
Libor Smejkal, Charles University in Prague, Czech Republic
Massimiliano Stengel, ICREA, Spain
Vladimir Stoica, Pennsylvania State University, USA
Oleg Tretiakov, University of New South Wales, Sydney, Australia
Maia Garcia Vergniory, Ikerbasque, San Sebastian, Spain
Haidan Wen, Argonne National Laboratory, USA
Pavlo Zubko, University College London, UK

Technical program

The program started on Sunday evening, 16^th June, the lectures started on Monday morning, 17^th June, and finished on Thursday early afternoon, 20^th June.

Sunday, June 16 (Floret)

18:00–20:00

Get together event

Monday, June 17 (Floret)

8:25–8:30	Opening
8:30–9:10	T. Jungwirth Crystal symmetries and transport phenomena in antiferromagnets
9:10–9:30	L. Smejkal Electronic Structure of Crystal Hall Antiferromagnets
9:30–9:50	J. Mackel Topological defects in ferroics: Searching for skyrmions in magnetic thin films and ferroelectric single crystals
9:50–10:30	P. Zubko Nanoscale domains in metal-ferroelectric heterostructures
10:30–11:00	Coffee break
11:00–11:40	F. Araoka Electrical-frustration induced topological defects in nematics: topological defect array and dynamic solitons
11:40–12:20	A. Saxena Merons, skyrmions and tubular structures in chiral magnets and liquid crystals
12:20–13:00	P. Jizba TUTORIAL 1: Introduction to homotopy theory

13:00–14:30	LUNCH

14:30–15:00	P. Jizba TUTORIAL 2 : Introduction to solitons and instantons
15:00–15:40	M. G. Vergniory Introducing Topological Quantum Chemistry for materials search and applications
15:40–16:00	K. Shapovalov Bistable interfacial polarization and ferroelectricity in SrTiO₃
16:00–16:30	M. Mochizuki Microwave-driven dynamics of magnetic skyrmions
16:30–17:00	Coffee break
17:00–17:40	B. Braun Dynamical skyrmions and emergent electromagnetism of moving monopoles in nanostructures
17:40–18:20	S. Kralj Classical nematic liquid crystal analogues of Majorana particles
18:20–18:50	H. N. Lee Interfacial control of noncollinear spin strucures in 3d-5d quantum heterostructures
18:50–19:00	group photo
19:00–20:20	DINNER
20:20–21:00	I. I. Smalyukh Knotland

Tuesday, June 18 (Floret)

8:30–9:10	C. Pfleiderer Topological magnetic order far from equilibrium
9:10–9:50	J. Seidel Topological structures as nanoscale functional elements
9:50–10:30	A. Grunebohm Functional bubble domains in ferroelectric superlattices
10:30–11:00	Coffee break
11:00–11:40	R. Rivers Testing causality in defect production in annular junctions and superconductors
11:40–12:20	C. A. Heikes The interplay of polar structure, superconductivity, and topology in Weyl semimetal MoTe₂
12:20–13:00	F. N. Rybakov Hopfions in magnets and superconductors

13:00–14:30	LUNCH

14:30–14:40	Short introduction of poster contributions
14:40–15:10	V. P. Kravchuk Nonlinear dynamics of skyrmion strings
15:10–15:50	O. Gomonay Antiferromagnetic skyrmion: spin eigen-modes and current-induced dynamics
15:50–16:30	M. Klaui Topological dynamics - ultrafast spin manipulation for novel memory and thermal diffusion for unconventional logic devices
16:30–17:00	Coffee break
17:00–17:40	I. Kezsmarki Switching between Neel- and Bloch-type skyrmions in lacunar spinels
17:40–18:00	R. L. Dally Probing skyrmion dynamics with SANS in GaV₄S₈
18:00–18:20	S. Ghara Conducting domain walls in the orbital-order driven polar state of lacunar spinels
18:20–19:00	T. Ono Vanishing skyrmion Hall effect in ferrimagnet

19:00–20:20	DINNER AND ADVISORY BOARD MEETING
20:20–21:00	L. Eng Identifying the novel Skyrmion phase in Cu₂OSeO₃ by Magnetic-Force-Microscopy

Wednesday, June 19 (Floret)

8:30–9:10	A. Loidl MnCr₂S₄: a multiferroic spin supersolid
9:10–9:50	S. M. Griffin Doubling up the topological order in hexagonal manganites
9:50–10:30	S. Coh Phonons with angular momentum in systems with broken symmetries
10:30–11:00	Coffee break
11:00–11:40	C. Lichtensteiger Tuning of the depolarization field, built-in voltage and nanodomain structure in ferroelectric thin films
11:40–12:00	B. Kirbus Real-time and in-situ probing of first- and second-order phase transitions of BaTiO₃ domain walls through 3D Cherenkov SHG
12:00–12:20	C. Weymann Domain configuration and microstructure in ferroelectric ultrathin films
12:20–13:00	S. Cherifi Hertel SHG imaging of nontrivial polarization textures at and close to ferroelectric domain walls

13:00–14:30	LUNCH

14:30–15:10	E. K. H. Salje Domain glass phenomena
15:10–15:50	W. Schranz Dynamic phase transitions in ferroelastic systems with randomly pinned domain walls
15:50–16:30	M. Stengel New functionalities from gradients: Flexoelectricity and more
16:30–17:00	Coffee break
17:00–17:40	T. W. Noh Ferroelectrically tunable magnetic skyrmions in ultrathin oxide heterostructures
17:40–18:10	V. Ya. Shur Growth of dendrite domains and superfast domain shape transformation in ferroelectrics
18:10–18:30	A. R. Akhmatkhanov Transition from 2D to 1D domain growth in KTP with surface dielectric layer
18:30–19:00	G. Catalan Metal-insulator phase boundaries in VO₂ films

19:00–20:20	DINNER
20:20–21:00	L.Q. Chen Computational Understanding and Prediction of Polar States in Ferroelectric Heterostructures Using Phase-field Method

Thursday, June 20 (Kaiserštejnský Palace)

7:30–9:00	Bus transfer to the city centre (departures 7:30 and 8:15)
9:00–9:20	A. Cano Multiferroic Fe langasite materials and their emergent magnetic textures
9:20–9:50	V. A. Stoica Optical creation of a supercrystal with three-dimensional nanoscale periodicity
9:50–10:10	W. Peng Relaxor-like ferroelectricity in BaTiO₃ films via epitaxial symmetry engineering
10:10–10:50	I. Lukyanchuk Topology of ferroelectrics at the nanoscale: negative and super-capacitance, multivalued logic, and knotting
10:50–11:10	Coffee break
11:10–11:50	O. A. Tretiakov Magnetic bimerons as skyrmion analogues in in-plane magnets
11:50–12:30	H. Wen Ultrafast structural dynamics of ferroelectric domains and vortices
12:30–12:50	M. A. P. Goncalves Second-principles studies of topological textures in ferroelectrics
12:50–13:30	R. Ramesh Observation of room temperature polar skyrmions

13:30	LUNCH