Recherche sur le Covid-19

Au PSI, plusieurs projets se consacrent à des questions de recherche importantes autour du coronavirus Sars-CoV-2 et des maladies qui en résultent. Nous vous informons sur les activités et les projets, par exemple sur les analyses de tissus pulmonaires, sur la production de protéines et d'anticorps ou sur les idées de nouvelles recherches sur le Covid-19.

Liens utils

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Observation of a d-wave nodal liquid in highly underdoped Bi2Sr2CaCu2O8+δ

A key question in condensed-matter physics is to understand how high-temperature superconductivity emerges on adding mobile charged carriers to an antiferromagnetic Mott insulator. We address this question using angle-resolved photoemission spectroscopy to probe the electronic excitations of the non-superconducting state that exists between the Mott insulator and the d-wave superconductor in Bi2Sr2CaCu2O8+δ.

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Watching atoms move: an ultrafast phase transition

One approach to advance our understanding of the complex interactions between different degrees of freedom in strongly correlated systems is to use time-resolved methods to study the response of a material after it has been driven out of equilibrium. Ultrafast optical techniques have demonstrated considerable potential to unravel the correlations that drive the interesting physics in such materials.

How fast can the lattice symmetry of a solid change?

One approach to advance our understanding of the complex interactions between different degrees of freedom in strongly correlated systems is to use time-resolved methods to study the response of a material after it has been driven out of equilibrium. Ultrafast optical techniques have demonstrated considerable potential to unravel the correlations that drive the interesting physics in such materials.

Watching atoms move

A complete characterization of the unit cell dynamics of a laser-excited tellurium crystal is demonstrated using femtosecond x-ray diffraction. The analysis offers a quantitative measure of the unit cell dynamics without making any assumptions on the symmetry of the excited-state motion.

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Confinement-Induced Orientational Alignment of Quasi-2D Fluids

Extreme confinement is known to induce ordering of the fluid, thereby affecting its properties.

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Advanced phase contrast imaging using a grating interferometer

Conventional absorption based X-ray microtomography can become limited for objects showing only very weak attenuation contrast at high energies. However, a wide range of samples studied in biology and materials science can produce significant phase shifts of the X-ray beam and thus phase contrast X-ray imaging can provide substantially increased contrast sensitivity.