论文标题
是否存在原始的，未结构的SRTIO $ _3 $（001）表面？
Does a pristine, unreconstructed SrTiO$_3$(001) surface exist?
论文作者
论文摘要
钙钛矿氧化物的表面会影响其功能特性，尽管通常假定散装截断（1 $ \ times $ 1）终止，但其存在和稳定性是有争议的。在这里，这种表面是通过在超高真空中裂解典型的Srtio $ _3 $（001）来创建的，并且观察到其对热退火的响应。原子解析的NC-AFM表明，在200 \，$^\ Circ $ c的温度下，AS旋转的表面上的固有点缺陷迁移。在400--500 \，$^\ Circ $ C，一种无序的表面层形式，尽管LEED中仍具有（1 $ \ times $ 1）的模式。尽管LEED中的（1 $ \ times $ 1）的周期性（1 $ \ times $ 1）的周期性，但纯粹是由湿化学处理制备的纯粹的Tio $ _2 $末端的表面也是无序的。
The surfaces of perovskite oxides affect their functional properties, and while a bulk-truncated (1$\times$1) termination is generally assumed, its existence and stability is controversial. Here, such a surface is created by cleaving the prototypical SrTiO$_3$(001) in ultra-high vacuum, and its response to thermal annealing is observed. Atomically resolved nc-AFM shows that intrinsic point defects on the as-cleaved surface migrate at temperatures above 200\,$^\circ$C. At 400--500\,$^\circ$C, a disordered surface layer forms, albeit still with a (1$\times$1) pattern in LEED. Purely TiO$_2$-terminated surfaces, prepared by wet-chemical treatment, are also disordered despite their (1$\times$1) periodicity in LEED.
