Lattice distortion of oxygen monolayer on Ag(111) observed by scanning probe microscopy

Lattice distortion of oxygen monolayer on Ag(111) observed by scanning probe microscopy
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扫描探针显微镜观察到 Ag(111) 上氧单层的晶格畸变

DOI:
10.1103/physrevb.106.115432
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发表时间:
2022
期刊:
影响因子:
3.7
通讯作者:
Sugimoto Yoshiaki
Sugimoto Yoshiaki
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Kimura Mitsuo;Sugimoto Yoshiaki

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氧分子()物理吸附在固体表面是感兴趣的低维自旋系统。在4.5 K的温度下,使用扫描隧道显微镜结合带有末端的原子力显微镜观察到吸附在Ag(111)表面密度小于1ml的单分子膜。不同的结构域与它们的比密度混合在一起,每个结构域与衬底的旋转角度不同。晶格的形状与单层和衬底之间的旋转角度有关。旋转角度大于的结构域可以用在线重合模型来解释,这一模型以前只在有机分子中得到证实。与衬底的重合自然地定量地解释了观察到的晶格畸变。另一方面,在旋转角附近的畴中,晶格畸变比先前归因于自旋的研究要小。然而,两者之间最短距离的长度暗示了反铁磁秩序。
Oxygen molecules () physically adsorbed on solid surfaces are of interest as low-dimensional spin systems. Monolayers ofadsorbed on an Ag(111) surface at a low density of less than 1 ML are observed at 4.5 K using scanning tunneling microscopy combined with atomic force microscopy withterminated tips. Various domains with their specific density are mixed, each with different rotation angles to the substrate. The shape of thelattice correlates with the rotation angle between the monolayer and the substrate. The domains with a rotation angle of greater thancan be explained by the model of on-line coincidence, which had previously been confirmed only for organic molecules. The coincidence with the substrate naturally explains the observed lattice distortion quantitatively. On the other hand, in domains at the rotation angle near, the lattice distortion is smaller than that of previous study that attributed it to spin. Nevertheless, the length of the shortest distance between twoimplies antiferromagnetic order.
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