Quantum magnetism remains at the forefront of condensed matter physics. On one hand, it provides the ideal arena for developing and testing new fundamental concepts in solid-state and statistical physics, on the other hand it has a pivotal role in several classes of emerging materials with new electronic properties.

Lay summary

This SNF Research Project targets three exciting topics in quantum magnetis:

A Checkerboards - The fundamental 2D Heisenberg model on square and related lattices, ad-vancing understanding of the excitation spectrum and its extension to undoped and weakly doped cuprates

B Skyrmions – emergent magnetic objects, which in the magnetoelectric compound Cu2OSeO3 can be controlled by electric fields

C Dipolar coupled magnetic model systems LiREF4, providing examples of classical and quantum criticality, dimensional reduction, electronic-nuclear entanglement etc.