[institut] [phys4phys] Institut Vinca vas poziva na predavanje dr Srdjana Stavrica: Why all that fuss about altermagnets?

[Tamara Djuric]

Poštovane koleginice i kolege,

pozivamo Vas na XIX Naučnu tribinu u ovoj godini koja će se odrzati u
četvrtak 13.11.2025. godine sa početkom u 11 časova u svečanoj sali
Laboratorije 050 u Institutu Vinča. Tom prilikom će predavanje
održati dr Srđan Stavrić, viši naučni saradnik Laboratorije za
teorijsku fiziku i fiziku kondenzovane materije u Institutu Vinča.
Kratka biografija kolege Stavrica se nalazi u prilogu.
Pozivamo sve zainteresovane kolege da nam se pridruže.

Predavanje nosi naslov: Čemu sva ta pompa oko altermagneta?

Apstrakt predavanja

Why all that fuss about altermagnets?

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, et al.: Nature 642, 64 (2025)
[5] M. Milivojević, M. Orozović, S. Picozzi, M. Gmitra, S. Stavrić:
2D Mater. 11, 035025 (2024)

Srdačan pozdrav,

Komisija za naučnu tribinu i popularizaciju nauke Instituta Vinča i
dr Srđan Stavrić, viši naučni saradnik Laboratorije za teorijsku
fiziku i fiziku kondenzovane materije, Institut Vinča
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