The PSI Center for Neutron and Muon Sciences uses neutrons and muons to explore and understand matter and materials.
Lab News & Scientific Highlights
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.
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 ...
Emergence of topological Hall effect from a fluctuation-based dynamic origin
The topological nature of the electronic bands or spin structure has direct manifestation in experimentally measured Hall conductivity. The extra topological (or geometrical) component to the Hall effect (THE) usually emerges due to multi-k structures, which inherently possess a finite static scalar spin chirality (SSC). Generating a THE in a single-k structure necessitates the consideration of the dynamical origin of SSC, the real material examples of such cases remain scarce to date.
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.
Zero-field Hall effect emerging from a non-Fermi liquid in a collinear antiferromagnet V1/3NbS2
Magnetically intercalated transition metal dichalcogenides (TMDs) provide a versatile three-dimensional (3D) material platform to explore quantum phenomena and functionalities that emerge from an intricate interplay among magnetism, band structure, and electronic correlations.
Generation of Neutron Airy Beams
The Airy wave packet is a solution to the potential-free Schrödinger equation that exhibits remarkable properties such as self-acceleration, nondiffraction, and self-healing. Although Airy beams are now routinely realized ....
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Recent CNM publications
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Decrausaz B, Pikulski M, Ivashko O, Christensen NB, Choi J, Udby L, et al.
Dynamic competition between Cooper pair and spin density wave condensation
Physical Review Research. 2025; 7(2): 023131 (7 pp.). https://doi.org/10.1103/PhysRevResearch.7.023131
DORA PSI -
Park P, Ortiz BR, Sprague M, Sakhya AP, Chen SA, Frontzek MD, et al.
Spin density wave and van Hove singularity in the kagome metal CeTi3Bi4
Nature Communications. 2025; 16: 4384 (9 pp.). https://doi.org/10.1038/s41467-025-59460-4
DORA PSI -
Ashanujjaman S, Banik S, Coloretti G, Crivellin A, Maharathy SP, Mellado B
Anatomy of the real Higgs triplet model
Journal of High Energy Physics. 2025; 2025(4): 3 (55 pp.). https://doi.org/10.1007/JHEP04(2025)003
DORA PSI -
Rulev A, Wang H, Erat S, Aycibin M, Rentsch D, Pomjakushin V, et al.
119Sn element-specific phonon density of states of BaSnO3
Crystals. 2025; 15(5): 440 (12 pp.). https://doi.org/10.3390/cryst15050440
DORA PSI