LNS: Laboratory for Neutron Scattering and ImagingThe Laboratory for Neutron Scattering and Imaging (LNS) at the Paul Scherrer Institute is responsible for the scientific exploitation, operation and development of neutron scattering and imaging instruments at the Swiss Spallation Neutron Source (SINQ). The team of 50 senior scientists, postdoctoral researchers and PhD students further collaborates on diverse research projects ranging from modern topics in condensed matter physics and materials science to pressing questions in energy research and health care. read more
PhD, Master, Bachelor or Semester projects at the LNSWe offer students the possibility to do their PhD or educational research in our lab. See Teaching and Education for detailed information on Master/Diploma thesis, Bachelor/Semester work and practical courses at the LNS. Currently we have open positions for
- Semester projects on several topics
- Master project - Elastic properties in low dimensional quantum systems
- Master project - Spontaneous magnon decay in non-collinear antiferromagnets
- Master project - Geometrical magnetic frustration beyond insulating ionic compounds
- Master project - Magnetic order in anisotropic triangular materials
- Master project - Magnetic structure of the quantum trimer compound Cs3Cu3Cl8OH
11. December 2017
SwedNess Students visit PSI for hands-on training in neutron scatteringTo take full advantage of the upcoming European Spallation Source facility ESS, strategic funding has been allocated to rebuild and expand the Swedish neutron scattering community. One of the most important actions is the establishment of the Swedish national graduate school in neutron scattering (SwedNess). Up to 40 PhD students will be fully funded, employed and trained within this school. In the end of September 2017, the first 20 PhD students arrived at the Paul Scherrer Institute (PSI) and the Swiss Spallation Neutron Source (SINQ) for their very first hands-on training in neutron scattering. During their week at PSI the SwedNess students obtained specific training in neutron reflectometry as well as neutron and x-ray imaging. The training was very much appreciated by the students and PSI looks forward to welcoming them back in a near future as scientific users of the SINQ neutron facility.
17. October 2017
Coulomb spin liquid in anion-disordered pyrochlore Tb2Hf2O7R. Sibille et al., Nature Communications 8, 892 (2017) (full article). The charge ordered structure of ions and vacancies characterizing rare-earth pyrochlore oxides serves as a model for the study of geometrically frustrated magnetism. The organization of magnetic ions into networks of corner-sharing tetrahedra gives rise to highly correlated magnetic phases with strong fluctuations, including spin liquids and spin ices. It is an open question how these ground states governed by local rules are affected by disorder. Here we demonstrate in the pyrochlore Tb2Hf2O7, that the vicinity of the disordering transition towards a defective fluorite structure translates into a tunable density of anion Frenkel disorder while cations remain ordered. Quenched random crystal fields and disordered exchange interactions can therefore be introduced into otherwise perfect pyrochlore lattices of magnetic ions. We show that disorder can play a crucial role in preventing long-range magnetic order at low temperatures, and instead induces a strongly fluctuating Coulomb spin liquid with defect-induced frozen magnetic degrees of freedom.
28. July 2017