Am PSI widmen sich mehrere Projekte wichtigen Forschungsfragen rund um das Coronavirus Sars-CoV-2 und den daraus resultierenden Erkrankungen. Wir informieren über Aktivitäten und Vorhaben, zum Beispiel zu Untersuchungen von Lungengewebe, zur Produktion von Proteinen und Antikörpern oder über Ideen für neue Forschung zu Covid-19.
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Metamagnetic texture in a polar antiferromagnet
The notion of a simple ordered state implies homogeneity. If the order is established by a broken symmetry, the elementary Landau theory of phase transitions shows that only one symmetry mode describes this state. At the exact points of phase coexistence, domain states composed of large regions of different phases can be stabilized by long-range interactions.
Large Anomalous Hall Effect in Topological Insulators with Proximitized Ferromagnetic Insulators
We report a proximity-driven large anomalous Hall effect in all-telluride heterostructures consisting of the ferromagnetic insulator Cr2Ge2Te6 and topological insulator (Bi,Sb)2Te3. Despite small magnetization in the (Bi,Sb)2Te3 layer, the anomalous Hall conductivity reaches a large value of 0.2e2/h in accord with a ferromagnetic response of the Cr2Ge2Te6.
First demonstration of a Germanium laser
Scientist at the Paul Scherrer Institut and ETH Zürich, with colleagues from CEA Grenoble, have demonstrated and characterized a technology that, for the first time, yields lasing from strained elemental Germanium. This achievement underlines PSI’s leading role in the development of Silicon-compatible laser light sources.
New NUM Laboratory for Neutron and Muon Instrumentation (LIN)
In the division Research with Neutrons and Muons (NUM) all technical knowledge and expertise concerned with the development and operation of the scientific instrumentation for neutron and muon experiments at our user facilities have been united in the new Laboratory for Neutron and Muon Instrumentation (LIN).
Welcome Yohei Uemura
We warmly welcome Yohei Uemura as Postdoc in the Laboratory of Environmental Chemistry. He joined the Surface Chemistry group on 1 July 2019.
Yohei Uemura got his master and PhD degree in chemistry at the University of Tokyo. He has then continued on an academic career path at different universities in Japan and last at Utrecht University in the Netherlands. His speciality is the application of fast and ultrafast X-ray absorption spectroscopy techniques to follow the chemical dynamics of reactions. At PSI, Yohei Uemura will study the photolysis of organo-iodide compounds and the fate of primary and secondary iodine products in aqueous solutions at the SwissFEL and the SuperXAS beamline.
Lehrberufe à la carte 2019
Am 30. Juni 2019 präsentiert das PSI seine 15 verschiedenen Lehrberufe. Auch das Schülerlabor iLab öffnet an diesem Sonntag seine Türen.
Soichiro Tsujino is one of the APL top reviewers of 2018
The editors of Applied Physics Letters (APL) named Dr. Soichiro Tsujino, head of the XFEL nanoengineering group of LMN, as one of the 16 ALP top reviewers in 2018.
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
First serial femtosecond crystallography experiment using SwissFEL’s large bandwidth X-ray pulses
The typical mode of operation at XFEL facilities uses the so-called self-amplified spontaneous emission (SASE) process to generate the short, bright X-ray pulses. This mode of operation is stochastic in nature, causing some variance in intensity and spectrum on a shot-to-shot basis, which makes certain types of crystallographic measurements much more challenging.
Molekulare Schere stabilisiert das Zell-Zytoskelett
Forschende des Paul Scherrer Instituts PSI haben einen wichtigen Teil des Kreislaufs identifiziert, der den Auf- und Abbau des Zellskelettes reguliert. Dazu beobachteten sie mithilfe der Synchrotron Lichtquelle Schweiz SLS Molekül-Scheren bei der Arbeit.
Lippenstift und Bier
PSI Frauen kamen zusammen aus Solidarität
Am 14. Juni 2019 luden Daniela Jahns und Sonia Reber alle PSI-Frauen aller Berufsgattungen zu einem solidarischen Zusammenstehen ein und stiessen (mit alkoholfreiem Bier und Wasser) auf einen erfolgreichen Frauenstreik-Tag an - Wir setzen ein Zeichen der Solidarität für den Frauenstreik.
PSI-Bildgebung hilft bei Raketenstarts
PSI-Forschende helfen der europäischen Raumfahrt: ihre Neutronen-Bildgebung dient der Qualitätssicherung entscheidender Bauteile für Raketenstarts.
Critical fields of Nb3Sn prepared for superconducting cavities
Nb3Sn is currently the most promising material other than niobium for future superconducting radiofrequency cavities. Critical fields above 120 mT in pulsed operation and about 80 mT in CW have been achieved in cavity tests. This is large compared to the lower critical field as derived from the London penetration depth, extracted from low field surface impedance measurements.
Modulated excitation Raman spectroscopy of vanadia-based catalysts
By combining modulated excitation and Raman spectroscopy, we obtained mechanistic insights that go beyond what is currently achievable with Raman experiments under steady-state conditions.
Floating islands to convert sunlight into energy
A recent paper published in PNAS and highlighted by CNN proposes creating islands to produce a liquid fuel (methanol) by recycling atmospheric CO2.
First Demonstration of Sub-femtosecond X-ray Pulses at SwissFEL
We have produced ultra-short X-ray FEL pulses at SwissFEL by strongly compressing low-charge electron beams. Single-shot spectral measurements with only a single mode (see the figure below) indicate a pulse duration well below one femtosecond (detailed analysis on the exact pulse duration is ongoing).
An frischer Luft und im Smog
PSI-Forschende bohren im Hochgebirge durch jahrtausendealtes Gletschereis und analysieren im indischen Delhi die weltweit höchsten Feinstaubkonzentrationen. Sie tragen dazu bei, globale Fragen zum Klimawandel zu klären und die Luftverschmutzung einzudämmen.
The Mu3e collaboration grieves for Kirk Arndt
We lost a very good friend and wonderful colleague.
Ausflug der Polymechaniklernenden zur Chronoswiss und zum Lasertag
Am Freitag 07.06.2019 haben alle Lernenden Polymechaniker und zwei Ausbildner an einem Teamevent teilgenommen, welches durch das Bussengeld der Lernenden finanziert wurde. Bei diesem Ausflug haben wir die Firma Chronoswiss besucht und anschliessend Lasertag gespielt. Der Ausflug wurde von einem Lernenden organisiert.
Das Energiesystem der Zukunft bereits heute möglichst real austesten
Mit dem Startschuss für das Projekt ReMaP erhalten Unternehmen eine weitere Möglichkeit schon jetzt ihre Vision für das Energiesystem der Zukunft zu testen. Die ESI-Plattform des PSI trägt dazu bei, erneuerbare Energie künftig besser und intelligenter zu nutzen.
Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint
A method to measure the superconducting (SC) stiffness tensor ρs, without subjecting the sample to external magnetic field, is applied to La1.875Sr0.125CuO4. The method is based on the London equation J=-ρsA, where J is the current density and A is the vector potential which is applied in the SC state.
Neues Material mit magnetischem Formgedächtnis
PSI-Forschende haben ein Material entwickelt, dessen Formgedächtnis durch Magnetismus aktiviert wird. Anwendungsgebiete für diese neue Art von Verbundstoffen sind beispielsweise Medizin, Raumfahrt, Elektronik oder Robotik.
Magnetically Addressable Shape-Memory and Stiffening in a Composite Elastomer
With a specific stimulus, shape‐memory materials can assume a temporary shape and subsequently recover their original shape, a functionality that renders them relevant for applications in fields such as biomedicine, aerospace, and wearable electronics. Shape‐memory in polymers and composites is usually achieved by exploiting a thermal transition to program a temporary shape and subsequently recover the original shape.
Multidimensional Characterization of Mixed Ligand Nanoparticles Using Small Angle Neutron Scattering
The properties of ligand protected gold nanoparticles are determined by the synergistic interplay of their structural components, including the metal core, the ligand shell, and the solvation layer. However, the simultaneous characterization of all these components remains a major challenge given their disparate chemical nature.
Park Innovaare: Financing of new Campus is secured
After an intensive round of negotiations, Park Innovaare concluded an investment agreement with CPV/CAP Pensionskasse Coop for the realization of the new buildings. With this agreement, Park Innovaare has come another step closer to realizing its goal: a state-of-the-art infrastructure of about 38’000 sqm next to the Paul Scherrer Institute PSI that is ideal for industrial R&D projects.
High-numerical-aperture optics is key to ultra-fast tomographic microscopy
A novel high-numerical-aperture macroscope optics dedicated to high-temporal and high-spatial resolution X-ray tomographic microscopy is available at TOMCAT. Coupled with the in-house developed GigaFRoST camera, this highly efficient imaging setup enables tomographic microscopy studies at 20 Hz and beyond, opening up new possibilities in tomographic investigations of dynamic processes. A detailed characterization of the macroscope performance was published in Journal of Synchrotron Radiation on May 21, 2019.
High-numerical-aperture optics is key to ultra-fast tomographic microscopy
A novel high-numerical-aperture macroscope optics dedicated to high-temporal and high-spatial resolution X-ray tomographic microscopy is available at TOMCAT. Coupled with the in-house developed GigaFRoST camera, this highly efficient imaging setup enables tomographic microscopy studies at 20 Hz and beyond, opening up new possibilities in tomographic investigations of dynamic processes. A detailed characterization of the macroscope performance was published in Journal of Synchrotron Radiation on May 21, 2019.
Kondo screening in a charge-insulating spinon metal
The Kondo effect, an eminent manifestation of many-body physics in condensed matter, is traditionally explained as exchange scattering of conduction electrons on a spinful impurity in a metal. The resulting screening of the impurity's local moment by the electron Fermi sea is characterized by a Kondo temperature TK, below which the system enters a strongly coupled regime.
From semiconductors to quantum technologies symposium
While information technology over the last 50 years has been based on conventional semiconductor electronics, future technologies – aiming to enhance the performance of computers, sensors and to secure data communication for the future internet – will use the quantum origins of nature.
This symposium highlighted the opportunities for the traditional semiconductor materials to remain the platform on which also the new quantum technologies will build on. The symposium, in part a celebration of the career of PSI Quantum Technologies group leader Hans Sigg, was held at ETHZ and included notable speakers both local and international, Gabriel Aeppli (PSI, ETHZ & EPFL), Jérôme Faist & Klaus Ensslin (ETHZ), Theo Rasing (RU Nijmegen), Giordano Scappucci (QuTech-TU Delft) and Klaus von Klitzing (MPI Stuttgart).
On isothermality in some commonly used plug flow reactors for X-ray based investigations of catalysts
Understand reactor design and characterize their behavior to avoid unwanted sources of error in determining structure function relationships in catalysis.