Dear Psi-k'ers,

 

The abstract submission deadline for the 2020 DPG Spring Meeting of the Condensed Matter Section (March 16-20, 2020 in Dresden/Germany) is approaching (deadline is 1st December 2019). This Spring Meeting is the largest March Meeting of any Physical Society after the APS in the US. It is attended every year by more than 5000 scientists primarily from Germany and Europe, but also from overseas. The conference language is English.

 

Please consider submitting your abstract to the focus session on “Higher-order magnetic interactions: implications in 2D and 3D magnetism” (see description below) that we are organising together with my co-chairs Jonathan White, Manuel dos Santos Dias and Stefan Blügel. The focus session comprises contributed talks as well invited ones (Yukitoshi Motome, Sergii Grytsiuk, Naoya Kanazawa, Julie Staunton, Matthias Bode).

 

The website for abstract submission is https://www.dpg-tagung.de/dd20/submission.html?language=en . To submit an abstract for the symposium above, choose “Ma: Magnetism division”, and later, as topic: Focus session: “Higher-order magnetic interactions: implications in 2D and 3D magnetism”.

 

With best regards,

Samir Lounis

 

Materials in which the magnetic moments order or cooperate in unusual ways underpin a plethora of physical phenomena, from strong magnetoelectric effects to topological quasiparticles, thus holding great promise for future spintronic and quantum computing applications. Magnetic interactions are the fundamental quantities that explain the complex magnetic phase diagrams and exotic excitation spectra of these intriguing materials. Recent theoretical and experimental developments have led to a realization of a pivotal role played by higher-order magnetic interactions in stabilizing intricate magnetic structures [1-5]. The 4-spin 3- site interaction [2] stabilizes an up-up-down-down state which can become chiral. Theoretically, novel 4-spin chiral interactions [3,4] and even 6-spin (chiral-chiral) couplings [4] might explain the emergence of complex short-period 3D magnetic structures, and could open a path to the discovery of materials hosting 3D topological magnetization textures, such as magnetic hopfions. Experimentally, 4-spin interactions are conjectured to play a central role in skyrmions lattice formation in frustrated centrosymmetric materials [1,5]. This area of research will make a strong impact in the field of magnetism in the upcoming years, so it is timely to organize a focus session that introduces the topic to the community and outlines the challenges ahead.

Connection to DFG programs: SFB 1143 (Correlated Magnetism: From Frustration to Topology), SPP 2137 (Skyrmionics: Topological Spin Phenomena in Real-Space for Applications).

[1] Hayami et al., Phys. Rev. B 95, 224424 (2017)
[2] Romming et al., Phys. Rev. Lett. 120, 207201 (2018); Krönlein et al., Phys. Rev. Lett. 120, 207202 (2018) 

[3] Brinker et al., New J. Phys. 21 083015 (2019)
[4] Grytsiuk et al., ArXiv:1904.02369 (2019)
[5] Kurumaji et al., Science 365, 914–918 (2019)