News Column

Investigators from University of Warwick Have Reported New Data on Materials Science

February 28, 2014



By a News Reporter-Staff News Editor at Science Letter -- Current study results on Science have been published. According to news reporting out of Coventry, United Kingdom, by NewsRx editors, research stated, "Understanding nanoscale friction and dissipation is central to nanotechnology(1-4). The recent detection of the electronicfriction drop caused by the onset of superconductivity in Nb (ref. 5) by means of an ultrasensitive non-contact pendulum atomic force microscope (AFM) raised hopes that a wider variety of mechanical-dissipation mechanisms become accessible."

Our news journalists obtained a quote from the research from the University of Warwick, "Here, we report a multiplet of AFM dissipation peaks arising a few nanometres above the surface of NbSe2-a layered compound exhibiting an incommensurate chargedensity wave (CDW). Each peak appears at a well-defined tip-surface interaction force of the order of a nanonewton, and persists up to 70 K, where the short-range order of CDWs is known to disappear."

According to the news editors, the research concluded: "Comparison of the measurements with a theoretical model suggests that the peaks are associated with local, tip-induced 2 pi phase slips of the CDW, and that dissipation maxima arise from hysteretic behaviour of the CDW phase as the tip oscillates at specific distances where sharp local slips occur."

For more information on this research see: Giant frictional dissipation peaks and charge-density-wave slips at the NbSe2 surface. Nature Materials, 2014;13(2):173-177. Nature Materials can be contacted at: Nature Publishing Group, Macmillan Building, 4 Crinan St, London N1 9XW, England. (Nature Publishing Group - www.nature.com/; Nature Materials - www.nature.com/nmat/)

Our news journalists report that additional information may be obtained by contacting M. Langer, University of Warwick, Dept. of Phys, Coventry CV4 7AL, W Midlands, United Kingdom. Additional authors for this research include M. Kisiel, R. Pawlak, F. Pellegrini, G.E. Santoro, R. Buzio, A. Gerbi, G. Balakrishnan, A. Baratoff, E. Tosatti and E. Meyer (see also Science).

Keywords for this news article include: Europe, Science, Coventry, United Kingdom

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Source: Science Letter


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