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Showing 1–9 of 9 results
Advanced filters: Author: S. C. Stähler Clear advanced filters

  • Ultrafast excitation offers new routes to controlling material properties on short timescales, but probes are needed to better understand the changes. By studying the phonon spectrum of VO2 in the time domain, Wall et al. find a prompt change in lattice potential after a photoinduced structural transition.

    • S. Wall
    • D. Wegkamp
    • M. Wolf
    Research
    Nature Communications
    Volume: 3, P: 1-6

  • A subset of seismic events recorded by InSight’s seismometer attributed to impacts was used to derive a new estimate of the current impact rate on Mars. The results suggest a rate higher than predicted by orbital imaging, but consistent with theoretical rates.

    • Géraldine Zenhäusern
    • Natalia Wójcicka
    • Domenico Giardini
    ResearchOpen Access
    Nature Astronomy
    Volume: 8, P: 1138-1147

  • As the Perseverance rover landed on the Martian surface, the sensors on NASA’s InSight Mars lander picked up no seismic or acoustic waves. This non-detection provides information on the crust and atmosphere of Mars.

    • Benjamin Fernando
    • Natalia Wójcicka
    • Ingrid J. Daubar
    ResearchOpen Access
    Nature Astronomy
    Volume: 6, P: 59-64

  • We invert Rayleigh wave ellipticity curves extracted from ambient seismic vibrations at the InSight landing site to resolve, for the first time on Mars, the shallow subsurface to around 200 m depth. While our seismic velocity model is largely consistent with the expected stacks of lava flows, we find a seismic low velocity zone at about 30 to 75 m depth that we interpret as a sedimentary layer sandwiched between layers of basalt flows.

    • M. Hobiger
    • M. Hallo
    • W. B. Banerdt
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-13

  • Metallization by photoexcitation of defect excitons is observed on very long time scales in bulk semiconductors, while ultrafast control of the conduction properties is appealing. Here, the authors demonstrate the ultrafast (20 fs) generation of a metal at the surface of ZnO upon photoexcitation.

    • L. Gierster
    • S. Vempati
    • J. Stähler
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-8

  • Mars is seismically active: 24 subcrustal magnitude 3–4 marsquakes and 150 smaller events have been identified up to 30 September 2019, by an analysis of seismometer data from the InSight lander.

    • D. Giardini
    • P. Lognonné
    • C. Yana
    Research
    Nature Geoscience
    Volume: 13, P: 205-212

  • Geophysical and meteorological measurements by NASA’s InSight lander on Mars reveal a planet that is seismically active and provide information about the interior, surface and atmospheric workings of Mars.

    • W. Bruce Banerdt
    • Suzanne E. Smrekar
    • Mark Wieczorek
    Reviews
    Nature Geoscience
    Volume: 13, P: 183-189