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[资源]
Scientists discover new way to study nanostructures
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Atomic-scale mechanical motions in nanowires can be excited by high-frequency alternating superconducting Josephson currents. In niobium dimer nanowires three vibrational modes were experimentally observed and identified through first-principles theoretical calculations. At top is a curve of the measured conductance plotted versus applied voltage showing a sequence of peaks corresponding to vibrational modes of the dimer of niobium atoms suspended between the left and right tip-electrodes, as depicted in the atomic configuration shown in the middle. Credit: Georgia Tech/Alexei Marchenkov/Uzi Landman Full Text: http://www.physorg.com/news104497490.html http://www.physorg.com/news104497490.html [ Last edited by luo.henry on 2008-4-29 at 10:03 ] |
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