Through a glass, lightly
Article Abstract:
It has been demonstrated that atomic motion below the glass transition temperature (Tg) involves single-atom hopping, while motion above Tg is more collective. This research concerns the diffusion of atoms in bulk metallic glass, but has implications for glass-forming systems as a whole. The study of metallic glasses is likely to bring further progress in investigating the range of coupling and decoupling behaviour that forms the glass transition.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Electrons in the looking glass
Article Abstract:
Manoharan and colleagues have developed a tiny laboratory for remote sensing, taking the form of an elliptical quantum corral. A cobalt atom was placed at one focus and was bombarded with electrons from a scanning tunnelling microscope (STM) tip. The Kondo resonance was observed as a rise in resistance at low temperatures, manifesting itself as a blip in the conductance.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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Too hot ot melt. Condensed matter
Article Abstract:
Rastogi and colleagues have observed inverse melting in a polymeric system. They studied phase transitions in the polymer poly(4-methylpentene-1) (P4MP1). The normal tetragonal crystal phase of the polymer was replaced by a hexagonal crystal phase at high pressure. The amorphous phase is shown to be structurally continuous with the liquid.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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