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Université de Fribourg

Probing the interplay between lattice dynamics and short-range magnetic correlations in CuGeO3 with femtosecond RIXS

Paris, E. ; Nicholson, Christopher W. ; Johnston, S. ; Tseng, Y. ; Rumo, Maxime ; Coslovich, G. ; Zohar, S. ; Lin, M. F. ; Strocov, V. N. ; Saint-Martin, R. ; Revcolevschi, A. ; Kemper, A. ; Schlotter, W. ; Dakovski, G. L. ; Monney, Claude ; Schmitt, T.

In: npj Quantum Materials, 2021, vol. 6, no. 1, p. 51

Investigations of magnetically ordered phases on the femtosecond timescale have provided significant insights into the influence of charge and lattice degrees of freedom on the magnetic sub-system. However, short-range magnetic correlations occurring in the absence of long-range order, for example in spin-frustrated systems, are inaccessible to many ultrafast techniques. Here, we show how...

Université de Fribourg

Selective extinction against redundant species buffers functional diversity

Pimiento, Catalina ; Bacon, Christine D. ; Silvestro, Daniele ; Hendy, Austin ; Jaramillo, Carlos ; Zizka, Alexander ; Meyer, Xavier ; Antonelli, Alexandre

In: Proceedings of the Royal Society B: Biological Sciences, 2020, vol. 287, no. 2020-1931, p. 20201162

The extinction of species can destabilize ecological processes. A way to assess the ecological consequences of species loss is by examining changes in functional diversity. The preservation of functional diversity depends on the range of ecological roles performed by species, or functional richness, and the number of species per role, or functional redundancy. However, current knowledge is...

Université de Fribourg

Theory of photoinduced ultrafast switching to a spin-orbital ordered hidden phase

Li, Jiajun ; Strand, Hugo U.R. ; Werner, Philipp ; Eckstein, Martin

In: Nature Communications, 2018, vol. 9, no. 1, p. 4581

Photo-induced hidden phases are often observed in materials with intertwined orders. Understanding the formation of these non-thermal phases is challenging and requires a resolution of the cooperative interplay between different orders on the ultra-short timescale. In this work, we demonstrate that non-equilibrium photo-excitations can induce a state with spin-orbital orders entirely...

Consortium of Swiss Academic Libraries

Short Timescale Core Dynamics: TheoryandObservations

Finlay, C. ; Dumberry, M. ; Chulliat, A. ; Pais, M.

In: Space Science Reviews, 2010, vol. 155, no. 1-4, p. 177-218