PhD Position: Order-from-Disorder in Quantum Magnets

PhD Position:
Order-from-Disorder in Frustrated Quantum Magnets

Physics Department, ETH Zurich, Neutron Scattering and Magnetism Group, is currently looking to fill a PhD position on experimental studies of frustrated quantum magnets using neutron scattering, μSR and other techniques. Geometric frustration in quantum systems leads to a tight competition between qualitatively new collective spin states, such as topological structures, quantum spin liquids, multipolar ordered phases and spin-supersolids, to name only a few.

Each state is characterized by its own set of elementary excitations that often have no analogue in semi‑classical physics. The winner of this competition is usually determined by mechanisms known as thermal and quantum order‑from‑disorder. Controlling these offers a way to manipulate and study such exotic systems. The successful candidate will realize this control experimentally in carefully selected prototypical magnetic materials.

The work will involve sample synthesis, X-ray diffraction, optical spectroscopy experiments, as well as magnetothermodynamic, magnetomechanical and magnetoacoustic measurements at mK‑temperatures and high magnetic fields. The research will culminate in neutron scattering, ultra‑high‑field, and muon spin rotation studies at state‑of‑the‑art large‑scale user facilities in Switzerland, France, Germany, UK, Japan and the USA. The successful candidate is expected to actively participate in every phase of the project and take the lead whenever possible.

No prior experience in neutron scattering is required, but a solid background in laboratory work is essential. A strong theoretical foundation in quantum mechanics, statistical physics, and quantum solid‑state physics is absolutely necessary. Good computer skills are a plus.