Info message Ce contenu n'est pas disponible en français. Ne plus afficher ce message. Scientific Highlights Titel Datum Année Année201920182017201620152014201320122011201020092008 Mois Moisjanvierfévriermarsavrilmaijuinjuilletaoûtseptembreoctobrenovembredécembre 27 août 2019 Evolution of Magnetic Order from the Localized to the Itinerant Limit Quantum materials that feature magnetic long-range order often reveal complex phase diagrams when localized electrons become mobile. In many materials magnetism is rapidly suppressed as electronic charges dissolve into the conduction band. In materials where magnetism persists, it is unclear how the magnetic properties are affected. 29 juillet 2019 Operando X-ray Characterization of High Surface Area Iridium Oxides to Decouple their Activity Losses for the Oxygen Evolution Reaction The increasingly popular power-to-gas technology for the utilization of hydrogen as a clean energy vector involves the use of electrolyzers to convert water into H2 and O2. The oxygen evolution reaction (OER) is the least efficient among these processes, and a catalyst is required to speed up its kinetics at the high potentials (customarily ≥ 1.4 V vs. the reversible hydrogen electrode) at which the reaction takes place. 12 juillet 2019 Spin fluctuation induced Weyl semimetal state in the paramagnetic phase of EuCd2As2 Weyl fermions as emergent quasiparticles can arise in Weyl semimetals (WSMs) in which the energy bands are nondegenerate, resulting from inversion or time-reversal symmetry breaking. Nevertheless, experimental evidence for magnetically induced WSMs is scarce. Here, using photoemission spectroscopy, we observe that the degeneracy of Bloch bands is already lifted in the paramagnetic phase of EuCd2As2. We attribute this effect to the itinerant electrons experiencing quasi-static and quasi–long-range ferromagnetic fluctuations. 4 juillet 2019 La star à l’écran: une machine moléculaire Communiqués de presse Biologie SwissFEL Grands instruments de recherche Recherche avec la lumière synchrotron Des chercheurs de l’Institut Paul Scherrer PSI ont filmé une machine moléculaire en mouvement grâce à la Source de Lumière Suisse SLS, et ainsi révélé comment fonctionne la production d’énergie au niveau des cellules membranaires. Ils ont développé à cet effet une nouvelle méthode qui pourrait permettre des succès inédits dans l’analyse des processus cellulaires. 25 juin 2019 PSI School for Master Degree Students - Introducing Photons, Neutrons and Muons for Condensed Matter Physics and Materials Science From 17 – 21 June 2019 the Neutron and Muon Division (NUM) and the Photon Science Division (PSD) of PSI hosted 18 Master Degree students of physics, chemistry, materials and interdisciplinary science, as well as nuclear engineering to provide an introduction to the characterization of materials with large scale facilities like SINQ, SμS, SLS and SwissFEL. The course taught a basic understanding of how photons, neutrons and muons interact with matter, and how this knowledge can be used to solve specific problems in materials research. Details of the program can be found at http://indico.psi.ch/event/PSImasterschool 7 mai 2019 Un matériaux innovant qui présente aussi de nouvelles quasi-particules Communiqués de presse Matière et matériaux Recherche sur les matériaux Recherche avec la lumière synchrotron Des chercheurs du PSI ont analysé à la Source de Lumière Suisse SLS un matériau cristallin innovant qui présente des propriétés électroniques encore jamais vues à ce jour. Ils ont entre autres réussi à détecter un nouveau type de quasi-particules appelées fermions de Rarita-Schwinger. 8 avril 2019 X‐Ray Writing of Metallic Conductivity and Oxygen Vacancies at Silicon/SrTiO3 Interfaces Lithography‐like writing of conducting regions at the interface between SrTiO3 and amorphous Si using X‐ray irradiation opens ways for spatially controlled functionalities in oxide heterostructures. 1 avril 2019 HERCULES school 2019 at SLS In the week of April 1-5 PSI welcomes 20 PhD students and postdocs taking part in the European HERCULES 2019 school on Neutron and Synchrotron Radiation. They will attend lectures and perform two days of practical courses at several beam lines of the Swiss Light Source. 23 mars 2019 Photoswitching in a Molecular Cube Niéli’s paper is accepted in the Journal of Physical Chemistry Letters! We use X-ray absorption spectroscopy and X-ray magnetic circular dichroism to watch directly how the Co and Fe ions in a molecular cube change their oxidation states and turn from diamagnetic into paramagnetic units upon light irradiation. 1 2 3 4 5 6 7 8 9 … Page suivante ›› Dernière page Last » Sidebar PSI Scientific Reports Archive 2006-2012. The Scientific Reports – containing accounts of research topics from all the different areas – provide an impression of the variety of subjects researched at PSI.
27 août 2019 Evolution of Magnetic Order from the Localized to the Itinerant Limit Quantum materials that feature magnetic long-range order often reveal complex phase diagrams when localized electrons become mobile. In many materials magnetism is rapidly suppressed as electronic charges dissolve into the conduction band. In materials where magnetism persists, it is unclear how the magnetic properties are affected.
29 juillet 2019 Operando X-ray Characterization of High Surface Area Iridium Oxides to Decouple their Activity Losses for the Oxygen Evolution Reaction The increasingly popular power-to-gas technology for the utilization of hydrogen as a clean energy vector involves the use of electrolyzers to convert water into H2 and O2. The oxygen evolution reaction (OER) is the least efficient among these processes, and a catalyst is required to speed up its kinetics at the high potentials (customarily ≥ 1.4 V vs. the reversible hydrogen electrode) at which the reaction takes place.
12 juillet 2019 Spin fluctuation induced Weyl semimetal state in the paramagnetic phase of EuCd2As2 Weyl fermions as emergent quasiparticles can arise in Weyl semimetals (WSMs) in which the energy bands are nondegenerate, resulting from inversion or time-reversal symmetry breaking. Nevertheless, experimental evidence for magnetically induced WSMs is scarce. Here, using photoemission spectroscopy, we observe that the degeneracy of Bloch bands is already lifted in the paramagnetic phase of EuCd2As2. We attribute this effect to the itinerant electrons experiencing quasi-static and quasi–long-range ferromagnetic fluctuations.
4 juillet 2019 La star à l’écran: une machine moléculaire Communiqués de presse Biologie SwissFEL Grands instruments de recherche Recherche avec la lumière synchrotron Des chercheurs de l’Institut Paul Scherrer PSI ont filmé une machine moléculaire en mouvement grâce à la Source de Lumière Suisse SLS, et ainsi révélé comment fonctionne la production d’énergie au niveau des cellules membranaires. Ils ont développé à cet effet une nouvelle méthode qui pourrait permettre des succès inédits dans l’analyse des processus cellulaires.
25 juin 2019 PSI School for Master Degree Students - Introducing Photons, Neutrons and Muons for Condensed Matter Physics and Materials Science From 17 – 21 June 2019 the Neutron and Muon Division (NUM) and the Photon Science Division (PSD) of PSI hosted 18 Master Degree students of physics, chemistry, materials and interdisciplinary science, as well as nuclear engineering to provide an introduction to the characterization of materials with large scale facilities like SINQ, SμS, SLS and SwissFEL. The course taught a basic understanding of how photons, neutrons and muons interact with matter, and how this knowledge can be used to solve specific problems in materials research. Details of the program can be found at http://indico.psi.ch/event/PSImasterschool
7 mai 2019 Un matériaux innovant qui présente aussi de nouvelles quasi-particules Communiqués de presse Matière et matériaux Recherche sur les matériaux Recherche avec la lumière synchrotron Des chercheurs du PSI ont analysé à la Source de Lumière Suisse SLS un matériau cristallin innovant qui présente des propriétés électroniques encore jamais vues à ce jour. Ils ont entre autres réussi à détecter un nouveau type de quasi-particules appelées fermions de Rarita-Schwinger.
8 avril 2019 X‐Ray Writing of Metallic Conductivity and Oxygen Vacancies at Silicon/SrTiO3 Interfaces Lithography‐like writing of conducting regions at the interface between SrTiO3 and amorphous Si using X‐ray irradiation opens ways for spatially controlled functionalities in oxide heterostructures.
1 avril 2019 HERCULES school 2019 at SLS In the week of April 1-5 PSI welcomes 20 PhD students and postdocs taking part in the European HERCULES 2019 school on Neutron and Synchrotron Radiation. They will attend lectures and perform two days of practical courses at several beam lines of the Swiss Light Source.
23 mars 2019 Photoswitching in a Molecular Cube Niéli’s paper is accepted in the Journal of Physical Chemistry Letters! We use X-ray absorption spectroscopy and X-ray magnetic circular dichroism to watch directly how the Co and Fe ions in a molecular cube change their oxidation states and turn from diamagnetic into paramagnetic units upon light irradiation.
