教師資料查詢 | 類別: 期刊論文 | 教師: 李啟正 LEE, CHI-CHENG (瀏覽個人網頁)

標題: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
語言英文(美國)
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,電子版
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