PSI Center for Neutron and Muon Sciences

The PSI Center for Neutron and Muon Sciences uses neutrons and muons to explore and understand matter and materials.

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Lab News & Scientific Highlights

24.04.2025

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.

23.04.2025

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.

18.04.2025

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.

17.04.2025

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 ....

07.04.2025

Vacancy-induced suppression of charge density wave order and its impact on magnetic order in kagome antiferromagnet FeGe

Two-dimensional (2D) kagome lattice metals are interesting because their corner sharing triangle structure enables a wide array of electronic and magnetic phenomena. Recently, post-growth annealing is shown to both suppress charge density wave (CDW) order and establish long-range CDW with the ability to cycle between states repeatedly in the kagome antiferromagnet FeGe.

Here we perform ...

02.04.2025

New Website of the Swiss Neutron Science Society

Please check out the new online presence of the Swiss Neutron Science Society (SNSS)

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Our Facilities

Swiss Spallation Neutron Source SINQ

Neutron scattering techniques are highly versatile and powerful tools for studying the structure and dynamics of condensed matter. A wide scope of problems, ranging from fundamental to solid state physics and chemistry, and from materials science to biology, medicine and environmental science, can be investigated with neutrons. In addition to scattering, non-diffractive methods like imaging techniques allows for non-destructive inspection of materials and components, providing information on their internal structure, composition, and integrity with growing relevance also for industrial applications.

Swiss Muon Source SμS

The Swiss muon source – powered by the PSI 590 MeV cyclotron with a proton current of 2200 mA – is the world's most intense continuous beam muon source. The proton beam hits two graphite targets. Attached to those are seven beamlines for muon (or pion) extraction, two of them are equipped with superconducting decay channels. The available muon energies range from 0.5 keV to 60 MeV.

Swiss Research Infrastructure for Particle Physics CHRISP

With particle beams made up of pions, muons, neutrons, protons, and electrons, researchers are investigating how our universe is constructed. The Swiss research infrastructure for particle physics – CHRISP – enables them to determine fundamental natural constants with the greatest precision and to look for deviations from the current standard model of particle physics.

Recent CNM publications

A. A, Kalal S, Saravanan K, Ojha S, Stahn J, Gupta M
Study of structural and magnetic properties of Pd-doped Co₄N thin films
Journal of Superconductivity and Novel Magnetism. 2025; 38(1): 17 (7 pp.). https://doi.org/10.1007/s10948-024-06880-w
DORA PSI
Abel C, Ayres NJ, Ban G, Bison G, Bodek K, Bondar V, et al.
Generating a highly uniform magnetic field inside the magnetically shielded room of the n2EDM experiment
European Physical Journal C: Particles and Fields. 2025; 85(2): 202 (19 pp.). https://doi.org/10.1140/epjc/s10052-025-13902-x
DORA PSI
Adachi T, Ogawa T, Komiyama Y, Sumura T, Saito-Tsuboi Y, Takeuchi T, et al.
Spontaneous magnetic field and disorder effects in BaPtA_s1-xSb_x with a honeycomb network
Physical Review B. 2025; 111(10): L100508 (6 pp.). https://doi.org/10.1103/PhysRevB.111.L100508
DORA PSI

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Upcoming Events

Mai

15. Mai 2025 • 11:15 - 12:15

•Auditorium (WHGA/001)

Mai

Bootstrap methods in statistical field theories

Prof. Giuseppe Mussardo

Mai

16. Mai 2025 • 11:15 - 12:15

•Auditorium (WHGA/001)

Mai

God plays dice with the world

Prof. Giuseppe Mussardo

More Events

The PSI Center for Neutron and Muon Sciences in figures

300

The CNM center hosts 300 members of staff, in addition 40 PhD students perform their thesis work within CNM

5+1

The center is organized in 5 laboratories and 1 staff group.

3/30

CNM operates 3 of the 5 large scale user facilities: the Swiss spallation neutron source SINQ, the Swiss Muon Source SμS and the facilities for particle physics CHIRSP with approximately 30 experimental stations open for users.

1700

The facilities in the CNM center are open to international access — with approximately 1700 annual user visits the associated user program is a key activity for the center and for PSI as a whole.