ÖPG-CMD Joint Meeting 2026

Impact of Spin–Phonon Interactions on Magnetism in Frustrated Triangular and Kagome Lattices

Sep 21, 2026, 10:30 AM

30m

HS 15.05 (University of Graz)

4) Invited talk M11 - Electron-phonon coupling in correlated quantum matter Mini-Colloquium

Speaker

Roser Valenti

Description

The nature of the ground state of the spin-1/2 Heisenberg model on frustrated triangular and kagome lattices remains a central question in quantum magnetism. Here, we will present a variational Monte Carlo study of a spin–phonon Hamiltonian on the triangular and kagome lattices, fully incorporating quantum dynamics of both spins and phonons., and will discuss possible instabilities of the underlying quantum spin liquid groundstate towards the presence of a spin-phonon interaction [1-2]. We will discuss the implications of the results on quantum materials.

[1] Ferrari et al. Phys. Rev. B 109, 165133 (2024)
[2] Ferrari et al. Phys. Rev. Research 7, L042053 (2025)

This work has been done in collaboration with Francesco Ferrari, Josef Willsher, Urban F. P. Seifert, Johannes Knolle and Federico Becca