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SμS: Swiss Muon Source
µSR - Muon Spin Rotation, Relaxation or Resonance: A research tool using muons as sensitive local magnetic probes in matter.
Research at the LMU focuses mainly on magnetic properties of materials and on positive muons or muonium (bound state of a positive muon and an electron) as light protons or hydrogen substitutes in matter.
Worldwide unique: The Low-Energy Muon Beam and µSR Spectrometer for the study of thin films, layers and surfaces, the possibility to perform high-field µSR with a field up to 9.5 Tesla, and the Extraction of Muons On Request for high frequency resolution and slow relaxation measurements.
Latest News
06 July 2020
Information for SµS users
Due to the Corona crisis and technical problems the restart of operation of the PSI high intensity proton accelerator (HIPA) has been delayed and is expected earliest for the 27th of July. The pandemic team of PSI approved in-house research at the SµS from this date on. According to today's situation, external/foreign users at the SµS will be allowed as of September 1st.
We have prepared a new experimental schedule that you can find here.
We have shifted the approved experiments of foreign users to a date as late as possible in the year and we assume that you will be able to conduct your experiments at PSI. However, for all experiments foreign travel restrictions and entry requirements into Switzerland and PSI need to be carefully considered. Up to date information about travel restrictions for Switzerland can be found here.
Some experiments (especially for Dolly) had to be scheduled before September 1st. For these experiments and for those experiments where travel restrictions do not allow traveling to PSI, the PSI team offers to conduct the experiments for the users. In such a case, the samples will have to be sent to the instrument scientist in time and an experimental plan can be submitted once per day. Please note that only one sample change per day will be possible in this operation mode. Please get in contact with the instrument scientists for the planning of your experiment and to inform us about the shipment of your samples. For experiments that can not be conducted in this way, it might be possible to shift the beamtime to the next year.
Latest scientific SμS highlights:
Spin-singlet to triplet Cooper pair converter interface
Combining magnetic and superconducting functionalities enables lower energy spin transfer and magnetic switching in quantum computing and information storage, owing to the dissipationless nature of quasi-particle mediated supercurrents. Here, we put forward a system where emergent spin-ordering and diffusion of Cooper pairs are achieved at a non-intrinsically magnetic nor superconducting metallo-molecular interface.
Split superconducting and time-reversal symmetry-breaking transitions in Sr2RuO4 under stress
Strontium ruthenate (Sr2RuO4) continues to present an important test of our understanding of unconventional superconductivity, because while its normal-state electronic structure is known with precision, its superconductivity remains unexplained. There is evidence that its order parameter is chiral, but reconciling this with recent observations of the spin part of the pairing requires an order parameter that is either finely tuned or implies a new form of pairing. Therefore, a definitive resolution of whether the superconductivity of Sr2RuO4 is chiral is important for the study of superconductivity.
Quantum spin-liquid states in an organic magnetic layer and molecular rotor hybrid
A better understanding of quantum spin liquids (QSLs), where spin dimer configurations are fluctuating even at the low- est temperatures, could be of use in quantum information, in superconducting or other technologies. This macroscopic collective state typically arises from geometrical frustration or low dimensionality. In the layered EDT-BCO, we report a QSL state, which is generated, on different bases, with the intrinsic disorder.