The PSI Center for Neutron and Muon Sciences uses neutrons and muons to explore and understand matter and materials.
Lab News & Scientific Highlights
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.
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 ....
New Website of the Swiss Neutron Science Society
Please check out the new online presence of the Swiss Neutron Science Society (SNSS)
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 ....
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 ...
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Recent CNM publications
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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