Blanco-Rey M, Abad J, Rogero C, Mendez J, Lopez M F, Martin-Gago J A, de Andres P L
Instituto de Ciencia de Materiales (CSIC), Cantoblanco, 28049 Madrid, Spain.
Phys Rev Lett. 2006 Feb 10;96(5):055502. doi: 10.1103/PhysRevLett.96.055502. Epub 2006 Feb 6.
Combining STM, LEED, and density functional theory, we determine the atomic surface structure of rutile TiO2 (110)-(1 x 2): nonstoichiometric Ti2O3 stripes along the [001] direction. LEED patterns are sharp and free of streaks, while STM images show monatomic steps, wide terraces, and no cross-links. At room temperature, atoms in the Ti2O3 group have large amplitudes of vibration. The long quasi-1D chains display metallic character, show no interaction between them, and cannot couple to bulk or surface states in the gap region, forming good atomic wires.
结合扫描隧道显微镜（STM）、低能电子衍射（LEED）和密度泛函理论，我们确定了金红石型TiO₂(110)-(1×2)的原子表面结构：沿[001]方向的非化学计量比Ti₂O₃条纹。LEED图案清晰且无条纹，而STM图像显示出单原子台阶、宽阔的平台且无交联。在室温下，Ti₂O₃基团中的原子具有较大的振动幅度。长的准一维链表现出金属特性，它们之间没有相互作用，并且在能隙区域不能与体相或表面态耦合，从而形成了良好的原子线。
