Fondements de la nature

A l’Institut Paul Scherrer, les scientifiques cherchent des réponses à la question essentielle des structures élémentaires de la matière et des principes fondamentaux de fonctionnement dans la nature. Ils étudient la structure et les propriétés des particules élémentaires – les plus petits composants de la matière – ou se penchent sur la question de savoir comment les molécules biologiques sont structurées et remplissent leur fonction. Les connaissances qu’ils acquièrent de la sorte ouvrent de nouvelles pistes de solution en sciences, en médecine ou dans le domaine des technologies.

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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.