Probing and controlling multipolar orders via strain and phonons

Arun Paramekanti (U Toronto)

Sep 23. 2024, 11:50 — 12:30

Quadrupolar orders can couple linearly to phonons leading to the possibility of probing and controlling multipolar magnets via phonons or via coupling to strain fields. We illustrate this physics in a number of multipolar magnets including Mott insulators with non-Kramers doublets as well in higher moment magnets with strong spin-orbit coupling. Our results employ Floquet-Magnus expansions and new numerical tools we have developed to generalize the usual spin-phonon dynamics to SU(N) dynamics coupled to phonons. Time-permitting, we will also discuss how these ideas may be used to tune magnon or triplon band topology.

Further Information
Venue:
ESI Boltzmann Lecture Hall
Recordings:
Recording
Associated Event:
Spin-Orbit Entangled Quantum Magnetism (Workshop)
Organizer(s):
Cesare Franchini (U of Vienna)
Vesna Mitrovic (Brown U, Providence)
Leonid Pourovskii (École Polytechnique, Palaiseau)