Atomic-scale visualization of surface-assisted orbital order
學年 106
學期 1
出版（發表）日期 2017-09-22
作品名稱 Atomic-scale visualization of surface-assisted orbital order
作品名稱（其他語言）
著者 Howon Kim; Yasuo Yoshida; Chi-Cheng Lee; Tay-Rong Chang; Horng-Tay Jeng; Hsin Lin; Yoshinori Haga; Zachary Fisk; Yukio Hasegawa
單位
出版者
著錄名稱、卷期、頁數 Science Advances Vol. 3, no. 9 eaao0362
摘要 Orbital-related physics attracts growing interest in condensed matter research, but direct real-space access of the orbital degree of freedom is challenging. We report a first, real-space, imaging of a surface-assisted orbital ordered structure on a cobalt-terminated surface of the well-studied heavy fermion compound CeCoIn5. Within small tip-sample distances, the cobalt atoms on a cleaved (001) surface take on dumbbell shapes alternatingly aligned in the [100] and [010] directions in scanning tunneling microscopy topographies. First-principles calculations reveal that this structure is a consequence of the staggered dxz-dyz orbital order triggered by enhanced on-site Coulomb interaction at the surface. This so far overlooked surface-assisted orbital ordering may prevail in transition metal oxides, heavy fermion superconductors, and other materials.
關鍵字
語言 en_US
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/117198 )