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.

MEG-II experiment

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.

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New Website of the Swiss Neutron Science Society

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

Forslund et al

Anomalous Hall Effect due to Magnetic Fluctuations in a Ferromagnetic Weyl Semimetal

The anomalous Hall effect (AHE) has emerged as a key indicator of time-reversal symmetry breaking (TRSB) and topological features in electronic band structures. Absent of a magnetic field, the AHE requires spontaneous TRSB but has proven hard to probe due to averaging over domains. The anomalous component of the Hall effect is thus frequently derived from extrapolating the magnetic field dependence of the Hall response. We show ....

Alshemi et al

Two Characteristic Contributions to the Superconducting State of 2H-NbSe2

Multiband superconductivity arises when multiple electronic bands contribute to the formation of the superconducting state, allowing distinct pairing interactions and gap structures. Here, we present field- and temperature-dependent data  ...

Andriushin et al

Observation of the spiral spin liquid in a triangular-lattice material

The spiral spin liquid (SSL) is a highly degenerate state characterized by a continuous contour or surface in reciprocal space spanned by a spiral propagation vector. Although the SSL state has been predicted in a number of various theoretical models, very few materials are so far experimentally identified to host such a state. Via combined single-crystal wide-angle and small-angle neutron scattering, we report observation  ...

Fauquet et al

Doping dependence of the dipolar correlation length scale in metallic SrTiO3

Superconducting domes, ubiquitous across a variety of quantum materials, are often understood as a window in which pairing is favored, opened by the fluctuations of competing orders. Yet, the understanding of how such a window closes is missing. Here, we show that inelastic neutron scattering ...

  • 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 BaPtAs1-xSbx with a honeycomb network
    Physical Review B. 2025; 111(10): L100508 (6 pp.). https://doi.org/10.1103/PhysRevB.111.L100508
    DORA PSI

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.

Postal address
Paul Scherrer Institut
Center for Neutron and Muon Sciences CNM

WHGA/345
5232 Villigen PSI
Switzerland