Cleaving-temperature dependence of layered-oxide surfaces.
Cleaving-temperature dependence of layered-oxide surfaces.
复制标题
层状氧化物表面的切割温度依赖性。
DOI：
10.1103/physrevlett.101.216103
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发表时间：
2008
影响因子：
8.6
通讯作者：
J. Barth
中科院分区：
文献类型：
--
作者：
Y. Pennec;N. Ingle;I. Elfimov;E. Varene;Y. Maeno;A. Damascelli;J. Barth
通过切割非极性二维氧化物产生的表面通常被认为是完美或理想的。然而，Sr2RuO4（一种典型的非极性二维氧化物）的单粒子光谱显示出显着的解理温度依赖性。我们证明这不是表面固有特征的结果：晶格参数和对称性、台阶高度、原子位置或态密度。相反，我们发现随着解理温度的升高，介观尺度的缺陷密度显着增加。这些氧化物表面缺陷的潜在普遍性可能会对界面控制和表面敏感测量的解释产生广泛的影响。
The surfaces generated by cleaving nonpolar, two-dimensional oxides are often considered to be perfect or ideal. However, single particle spectroscopies on Sr2RuO4, an archetypal nonpolar two-dimensional oxide, show significant cleavage temperature dependence. We demonstrate that this is not a consequence of the intrinsic characteristics of the surface: lattice parameters and symmetries, step heights, atom positions, or density of states. Instead, we find a marked increase in the density of defects at the mesoscopic scale with increased cleave temperature. The potential generality of these defects to oxide surfaces may have broad consequences to interfacial control and the interpretation of surface sensitive measurements.