[institut] REMINDER: Center for Solid State Physics and New Materials Seminar: Srđan Stavrić, 20. 10. 2025. at 12h

[zeljkad at ipb.ac.rs]

On 2025-10-15 12:06, zeljkad at ipb.ac.rs wrote:
> Dear colleagues,
> 
> You are kindly invited to the Center for Solid State Physics and New
> Materials seminar, which will be held on Monday, 20. 10. 2025. at
> 12:00, in the "Dragan Popović" lecture hall of the Institute of
> Physics Belgrade. The talk entitled:
> 
> Why all that fuss about altermagnets?
> 
> will be given by Dr. Srđan Stavrić.
> 
> The abstract of the talk:
> 
> Altermagnets are an emerging class of magnetic materials characterized
> by a collinear compensated arrangement of magnetic moments and a
> momentum-dependent spin splitting in the band structure. This peculiar
> combination, arising from specific crystal symmetries [1], merges the
> most desirable traits of antiferromagnets - such as ultrafast dynamics
> without stray fields - with the strong time-reversal-symmetry-breaking
> responses characteristic for ferromagnets [2]. Found in a diverse
> range of materials from metals to insulators, altermagnets offer a
> versatile new platform for next-generation spintronics, paving the way
> for high-density magnetic memory and terahertz nano-oscillators [3].
> This talk will explore the fundamental principles and significant
> potential of this exciting new class of materials. We will begin by
> establishing a new taxonomy of collinear magnets, introducing the
> distinct realms of ferromagnets, antiferromagnets, and altermagnets,
> and extending the concept to non-collinear p-wave magnets. A special
> focus will be on recent observation of p-wave magnetism in a
> spin-spiral type-II multiferroic NiI₂ [4]. We will explore how the
> symmetry-protected coupling between chirality and polar order enables
> electrical control of a primarily non-relativistic spin polarization
> in this material. Finally, we will examine the role of spin-orbit
> coupling in altermagnets and show what implications it may have on
> electronic and magnetic properties. In particular, we will focus on
> two-dimensional altermagnets, where this relativistic interaction
> cannot be neglected as it is the source of the magnetic anisotropy
> which is crucial for stabilizing long-range magnetic order at finite
> temperatures [5].
> 
> [1] L. Šmejkal, J. Sinova, T. Jungwirth: Phys. Rev. X 12, 031042 (2022)
> [2] L. Šmejkal, J. Sinova, T. Jungwirth: Phys. Rev. X 12, 040501 (2022)
> [3] C. Song, H. Bai, Z. Zhou et al.: Nat. Rev. Mater. 10, 473 (2025)
> [4] Q. Song, S. Stavrić, P. Barone, A. Droghetti, D. S. Antonenko et
> al.: Nature 642, 64 (2025)
> [5] M. Milivojević, M. Orozović, S. Picozzi, M. Gmitra, S. Stavrić: 2D
> Mater. 11, 035025 (2024)
> 
> Best Regards,
> Željka Dukić
> 
> Center for Solid State Physics and New Materials,
> Institute of Physics Belgrade
> Pregrevica 118, 11080 Belgrade, Serbia
> http://www.ipb.ac.rs/