Workshop on Topology in Magnetic Materials

Herzberg 193 5025 Asp Switzerland
Jonathan White (Laboratory for Neutron Scattering, Paul Scherrer Institut), Motoaki Hirayama, Naoya Kanazawa, Oksana Zaharko (PSI - Paul Scherrer Institut), Romain Sibille (PSI - Paul Scherrer Institut)

The main goal of the workshop is to bring together experts in the fields of magnetism and topology in order to discuss the accomplished progress and perspectives for future developments in the field of bulk magnetic topological materials. The program will cover fundamental aspects such as symmetry in topology, focus on topological and emergent properties of non-collinear magnets and multi-k spin textures as well as related experimental and theoretical methods. While a broad overview of the field will be discussed, a particular emphasis will be on the application of scattering techniques for the experimental elucidation of complex magnetic phases and textures. We aim to develop interdisciplinary communication and collaborations among internationally leading experts and to encourage young researchers to contribute to the field.


The workshop will be held at the Herzberg near Aarau, about 1 hour from both Zürich and PSI:

Participants with on-site accommodation are expected to arrive on 21st November around 18:00 (dinner included in full board registration fees) and to departure on 24th November around 17:00.


How to get there?
A special bus will depart at 18:10 from Aarau main station (Bahnhof) towards Herzberg on 21st November. The dinner on 21st November is included in the full board registration for participants with on-site accommodation. For participants who would travel outside these time windows, shuttles between the Herzberg and the closest bus stop (Staffelegg, Passhöhe) can be organised on request.

A special bus will depart at 17:00 from Herzberg towards Aarau main station (Bahnhof) on 24th November.

Should you have any questions, please contact the organisers at 


A map of the on-site directions is available (link to 'directions.pdf' below). For more information about bus and train connections in Switzerland, please consult

    • 9:00 AM 9:15 AM
      Welcome 15m
    • 9:15 AM 12:00 PM
      SESSION 1: Introductory Lectures
      • 9:15 AM
        Magnetism in topological materials from insulators to metals 1h
        Speaker: Cristian Batista
      • 10:15 AM
        Coffee break 45m
      • 11:00 AM
        Experimental perspective on the field of magnetism in bulk topological materials 1h
        Speaker: Joseph Checkelsky
    • 12:00 PM 1:30 PM
      Lunch break 1h 30m
    • 1:30 PM 6:15 PM
      SESSION 2: Theory and Symmetry of Topological Materials
      • 1:30 PM
        Topology in condensed matter: electrons, spins, and their interplay 45m

        In this tutorial talk I will review notions of topology and their various incarnations in condensed matter: topological Bloch bands, or defects in order parameter configurations, such as vortices or skyrmions. I will discuss some instances of how the latter may influence the former.

        Speaker: Markus Müller
      • 2:15 PM
        Topological Quantum Chemistry procedure for magnetic systems 45m
        Speaker: Maia Vergniory
      • 3:00 PM
        Magnetoelectric Classification of Skyrmions 20m
        Speaker: Sayantika Bhowal
      • 3:20 PM
        Coffee break 40m
      • 4:00 PM
        Recent advances in DFT calculations of topological magnetic materials 45m
        Speaker: Ryotaro Arita
      • 4:45 PM
        Charge order and superconductivity in kagome materials 45m
        Speaker: Titus Neupert
      • 5:30 PM
        Exploring materials space at the speed of ICT: quantum spin Hall insulators, Weyl semimetals, and spin-layer-locking FETs 45m
        Speaker: Nicola Marzari
    • 8:30 AM 12:20 PM
      SESSION 3: Experiments and Methodology
      • 8:30 AM
        Neutron and x-ray scattering studies of magnetic order in topological metals, semimetals and insulators 45m
        Speaker: Andrew Boothroyd
      • 9:15 AM
        Bulk measurements, electrical and thermal transport 45m
        Speaker: Max Hirschberger
      • 10:00 AM
        Coffee break 30m
      • 10:30 AM
        Magneto-optical study on topological magnets 45m
        Speaker: Youtarou Takahashi
      • 11:15 AM
        Quantitative magnetic imaging of skyrmions using transmission electron microscopy 45m
        Speaker: Andras Kovacs
      • 12:00 PM
        High-resolution magnetic imaging of skyrmions in 3D 20m
        Speaker: Bernd Rellinghaus
    • 12:20 PM 2:00 PM
      Lunch break and posters 1h 40m
    • 2:00 PM 5:45 PM
      SESSION 4: Multi-k spin textures, merons, skyrmions…
      • 2:00 PM
        Beyond skyrmions: review & perspectives of alternative magnetic nano-objects 45m
        Speaker: Börge Göbel
      • 2:45 PM
        Latest discoveries of new skyrmion materials 45m
        Speaker: Shinichiro Seki
      • 3:30 PM
        Coffee break 40m
      • 4:10 PM
        Skyrmion fluid and bimeron glass, competition with a chiral spin liquid 45m
        Speaker: Ludovic Jaubert
      • 4:55 PM
        muSR studies of spin fluctuations and critical behavior in (Mn,Fe)Si & MnGe 30m
        Speaker: Yasutomo Uemura
      • 5:25 PM
        Zero-field magnetic hedgehogs in a triangular Kondo lattice CePtAl4Ge2 20m
        Speaker: Soohyeon Shin
    • 6:00 PM 7:30 PM
      DINNER at HERZBERG for ALL participants 1h 30m
    • 7:30 PM 9:30 PM
      TUTORIAL SESSION: Multi-k spin textures, merons, skyrmions…
      • 7:30 PM
        Magnetic symmetry for multi-k structure models 40m
        Speaker: Vladimir Pomjakushin
      • 8:10 PM
        Multi-k from neutron single diffraction + SANS 40m
        Speaker: Wolfgang Simeth
      • 8:50 PM
        X-ray resonant magnetic scattering and imaging 40m
        Speaker: Victor Ukleev
    • 8:30 AM 12:30 PM
      SESSION 5: Novel electronic responses due to complex magnetism
      • 8:30 AM
        Topological magnons 45m
        Speaker: Paul McClarty
      • 9:15 AM
        Thermal Evolution of Dirac Magnons in the Honeycomb Ferromagnet CrBr3 20m
        Speaker: Stanislav Nikitin
      • 9:35 AM
        Emergent transport phenomena and phase transitions in topological chiral magnets 45m
        Speaker: Yukako Fujishiro
      • 10:20 AM
        Magneto-optical Detection of Topological Contributions to the Anom. Hall Effect 20m
        Speaker: Sandor Bordacs
      • 10:40 AM
        Coffee break 20m
      • 11:00 AM
        Correlation and topology induced exotic transport phenomena in magnetic pyrochlore and half-Heusler compounds 45m
        Speaker: Kentaro Ueda
      • 11:45 AM
        Muon spin rotation insight into the topological kagome magnets & superconductors 45m
        Speaker: Zurab Guguchia
    • 12:30 PM 2:00 PM
      Lunch break and posters 1h 30m
    • 2:00 PM 2:40 PM
      SESSION 5: Novel electronic responses due to complex magnetism
      • 2:00 PM
        Untangling twin domains and discovery of unconventional quasiparticle in Fe3Sn2: Laser ARPES perspective 20m
        Speaker: Sandy Ekahana
      • 2:20 PM
        Observation of vortex rings in a bulk micromagnet using X-ray tomography 20m
        Speaker: Sebastian Gliga
    • 2:40 PM 4:10 PM
      CLOSING SESSION: perspectives and new directions
      • 2:40 PM
        Future perspective on experimental phenomena involving topology and magnetism 45m
        Speaker: Yoshinori Tokura
      • 3:25 PM
        Future theoretical perspective on phenomena involving topology and magnetism 45m
        Speaker: Nicola Spaldin
    • 4:10 PM 5:00 PM
      Coffee and departure 50m