[Todos] CHARLA IFLYSIB - Viernes 31/03/2023, 10.30hs - "A glimpse of the 4th dimension in a spin liquid"

[Charlas IFLYSIB]

*Los esperamos con café 15 minutos antes de la charla en el lobby del
instituto*.

*Charla  IFLYSIB*
*Viernes 31/03/2023, 10:30hs.*
*Lugar: IFLySiB (59 #789 e/10 y 11, La Plata)*

*La charla será presencial pero **también** será transmitida vía Zoom en:*
https://utn.zoom.us/j/89038134365



*Título: *
*A glimpse of the 4th dimension in a spin liquid*


*Expositor: *
*Ludovic Jaubert *- CNRS, Université de Bordeaux, LOMA, Talence, France


*Resumen: *
*What we colloquially know about frustration, is that it prevents magnetic
order. But the interesting part is not so much the absence of something,
but rather what happens in its place.*
*Frustration usually stems from one of only two elementary units of spins:
either triangles or tetrahedra. In this seminar we will explore an
alternative route for frustration via molecular design in the metal-azolate
framework [Mn(ta)2], whose units are centred tetrahedra made of five spins
[1]. Using a combination of experiments, simulations and field theory, we
will show that this material is proximate to a spin liquid described as a
three-dimensional "slab" of a four-dimensional emergent Coulomb field. We
will also explain the large degeneracy and robustness of this spin liquid,
how it stabilises monopoles down to the lowest temperatures, and how it
evolves in presence of perturbations such as further neighbour couplings
[1,2]. By varying the ligand and nature of the magnetic ion, we are
convinced that metal-organic frameworks unlock a new door in frustrated
magnetism beyond the standard kagome and pyrochlore structures.*

[1] Nutakki, Röß-Ohlenroth, Volkmer, Jesche, Krug von Nidda, Tsirlin,
Gegenwart, Pollet & Jaubert, “Frustration on a centred pyrochlore lattice
in metal-organic frameworks”, arXiv:2203.08780
<https://arxiv.org/abs/2203.08780>
[2] Nutakki, Pollet & Jaubert (in preparation)



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