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Scientific Highlights

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Datum
23 May 2022
Photograph: Shutterstock

Atmospheric globe-trotters

The CLOUD experiment reveals a new mechanism by which atmospheric particles form. The particles rapidly travel the world, globally impacting cloud formation and climate.

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20 May 2022
Magnetic field lines of a He atom

Light-Induced Magnetization at the Nanoscale

Targeted manipulations of an atom's magnetic moment are tricky, as the charge currents used for this process are extremely difficult to control . Now, a consortium of collaborators in Germany, Switzerland, Slovenia and Italy reports on a solution to this problem in the cover page article of Physic Review Letters 128, Vol. 15. As it appears, the magnetization of an atomic gas can be altered by high-power lasers using a patterned wave front. The method is promising for studying and manipulating the magnetic properties of matter at the nanoscale.

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19 May 2022
Electronic nematicity in FeSe

Spin keeps electrons in line in iron-based superconductor

Electronic nematicity, thought to be an ingredient in high temperature superconductivity, is primarily spin driven in FeSe finds a study in Nature Physics.

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18 May 2022
hybrid perovskites

Mechanochromism of layered perovskites

The mechanochromism of hybrid 2D perovskites is probed at pressures compatible with practical applications

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16 May 2022
Kugellager

Things run smoother without lubricants

At the particle accelerators of PSI, the components have to withstand harsh conditions. This is why a special ball bearing that does not require grease as a lubricant has been in use since last year.

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10 May 2022
Knopp, Schnorr and Al Haddad at Maloja

New SwissFEL soft X-ray endstation welcomes first users

Maloja is go. First user experiments mark a double first, not only for the Maloja endstation but also for the second beamline of SwissFEL, Athos.

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10 May 2022
teaser

Direct mechanochemical synthesis of polyoxometalates

Polyoxomolybdates have been directly synthesized from basic reagents in a mechanochemical one-pot reaction.

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6 May 2022
Jungfraujoch

Deep learning to avoid weather disappointments

Saharan dust storms played havoc with weather predictions. Invertible neural networks to retrieve aerosol properties from light scattering data may help.

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3 May 2022
Mielke et al

Low-temperature magnetic crossover in the topological kagome magnet TbMn6Sn6

Magnetic topological phases of quantum matter are an emerging frontier in physics and materials science, of which kagome magnets appear as a highly promising platform. Here, we explore magnetic correlations in the recently identified topological kagome system TbMn6Sn6 using muon spin rotation, combined with local field analysis and neutron diffraction. Our studies identify an out-of-plane ferrimagnetic structure with slow magnetic fluctuations which exhibit a critical slowing down below T*C1 ≃ 120 K and finally freeze into static patches with ideal out-of-plane order below TC1 ≃ 20 K....

 

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27 April 2022
Example of a modulation excitation X-ray absorption spectrum and schematic representation of the structural site changes

In situ spectroscopy unveils the structural changes of the sites in single atom catalysts

To improve the performance of single atom catalysts (SACs),  the structure of their active sites under operative conditions needs to be better understood. For this, we have performed in situ X-ray absorption spectroscopy measurements using a modulation excitation approach selectively sensitive to the species involved in the electrochemical reactions. This has allowed us to study the structural changes undergone by two types of SACs, and to tie the observed differences to their catalytic activities.

 

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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.

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