Nagamura Naoka, Matsuda Iwao, Miyata Nobuhiro, Hirahara Toru, Hasegawa Shuji, Uchihashi Takashi
Department of Physics, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Phys Rev Lett. 2006 Jun 30;96(25):256801. doi: 10.1103/PhysRevLett.96.256801. Epub 2006 Jun 26.
The in-plane energy dispersion of quantized states in an ultrathin Ag film formed on the one-dimensional (1D) surface superstructure Si(111)-(4 x 1)-In shows clear 1D anisotropy instead of the isotropic two-dimensional free-electron-like behavior expected for an isolated metal film. The present photoemission results demonstrate that an atomic layer at the film-substrate interface can regulate the dimensionality of electron motion in quantum films.
在一维（1D）表面超结构Si(111)-(4×1)-In上形成的超薄银膜中，量子态的面内能量色散呈现出明显的一维各向异性，而非孤立金属膜所预期的各向同性二维类自由电子行为。当前的光电子能谱结果表明，膜-衬底界面处的原子层能够调控量子膜中电子运动的维度。
