News
Prof. Dr. Marc Janoschek appointed new Head of the PSI Center for Neutron and Muon Sciences (CNM)
Prof. Dr. Marc Janoschek will take over as Head of the PSI Center for Neutron and Muon Sciences (CNM) on 1 June 2025.
In Search of New Physics: New Result from the MEG II Collaboration
On the occasion of a special seminar at the Paul Scherrer Institut (PSI) in Switzerland on 23 April 2024 the scientific collaboration of the MEG II experiment presented an important new result in the search for the decay of a positive muon into a positron and a photon. The findings, based on data collected in 2021 and 2022, are detailed in a paper published on arXiv and submitted to the journal Physical Review Letters.
New Website of the Swiss Neutron Science Society
Please check out the new online presence of the Swiss Neutron Science Society (SNSS)
Scientific Highlights
Neue Massstäbe in der Kernphysik
Mit bislang unerreichter Präzision: PSI-Forschende vermessen den Kernradius von myonischem Helium-3 und stellen die Theorien der Atomphysik auf den Prüfstand.
Pressure tuning of competing interactions on a honeycomb lattice
Exchange interactions are mediated via orbital overlaps across chemical bonds. Thus, modifying the bond angles by physical pressure or strain can tune the relative strength of competing interactions. Here we present a remarkable case of such tuning between the Heisenberg (J) and Kitaev (K) exchange, which respectively establish magnetically ordered and spin liquid phases on a honeycomb lattice. We observe ...
Spin density wave and van Hove singularity in the kagome metal CeTi3Bi4
Kagome metals with van Hove singularities near the Fermi level can host intriguing quantum phenomena such as chiral loop currents, electronic nematicity, and unconventional superconductivity. However, to our best knowledge, unconventional magnetic states driven by van Hove singularities–like spin-density waves–have not been observed experimentally in kagome metals. Here, we report ...