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    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/117198

    題名: Atomic-scale visualization of surface-assisted orbital order
    作者: Kim, Howon;Yoshida, Yasuo;Lee, Chi-Cheng;Chang, Tay-Rong;Jeng, Horng-Tay;Lin, Hsin;Haga, Yoshinori;Fisk, Zachary;Hasegawa, Yukio
    日期: 2017-09-22
    上傳時間: 2019-10-03 12:10:53 (UTC+8)
    出版者: American Association for the Advancement of Science
    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.
    關聯: Science Advances Vol. 3, no. 9 eaao0362
    DOI: 10.1126/sciadv.aao0362
    顯示於類別:[物理學系暨研究所] 期刊論文


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