Nanostructural and local electronic properties of Fe/W(110) correlated by scanning tunneling spectroscopy.
Nanostructural and local electronic properties of Fe/W(110) correlated by scanning tunneling spectroscopy.
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通过扫描隧道光谱关联 Fe/W(110) 的纳米结构和局域电子特性。
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
R. Wiesendanger
中科院分区：
文献类型：
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作者：
M. Bode;R. Pascal;M. Dreyer;R. Wiesendanger
用扫描隧道谱(STS)测量，在W(110)衬底上生长的Fe(110)外延薄膜在费米能级以上0.2 eV处出现了一个峰值，峰高达第二赝态单分子层。在纳米尺度的Fe/W(110)楔形区上的STS直接表明，只要应力Fe膜开始松弛，空态密度就会减小。因此，由于薄膜和衬底之间的较大失配，前两个单分子层的电子结构在应力作用下发生了变化，从而可以解释局部导电率的变化。{版权所有}{1996年美国物理学会。}
Epitaxial Fe(110) films grown on W(110) substrates exhibit, up to the second pseudomorphic monolayer, a peak in {ital dI}/{ital dU} spectra at 0.2 eV above the Fermi level as measured by scanning tunneling spectroscopy (STS). It is shown directly by STS on nanometer-scale wedges of Fe/W(110) that the density of empty states is diminished wherever the stressed Fe film begins to relax. The change in local differential conductivity can therefore be explained by a stress-induced change of electronic structure for the first two monolayers due to the large misfit between film and substrate. {copyright} {ital 1996 The American Physical Society.}