Surface structure of novel semimetal WTe2
Surface structure of novel semimetal WTe2
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DOI：
10.7567/apex.10.045702
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发表时间：
2017-04-01
影响因子：
2.3
通讯作者：
Takagi, Noriaki
中科院分区：
文献类型：
--
作者：
Kawahara, Kazuaki;Ni, Zeyuan;Takagi, Noriaki
利用低能电子衍射（LEED）、扫描隧道显微镜和密度泛函理论（DFT）计算研究了二碲化钨（WTe2）表面的原子结构。从LEED和DFT分析中，我们发现微小但不可忽略的表面弛豫在第一层WTe2层内以振荡方式逐渐衰减。此外，DFT计算表明费米表面拓扑对这种弛豫很敏感。这些结果有助于理解WTe2的奇异性质。(C) 2017 .日本应用物理学会
We investigate the atomic structure of the tungsten ditelluride (WTe2) surface by using low-energy electron diffraction (LEED), scanning tunneling microscopy, and density functional theory (DFT) calculations. From the LEED and DFT analyses, we find small but non-negligible surface relaxation that gradually decays in an oscillatory manner inside the first WTe2 layer. In addition, the DFT calculations reveal that the Fermi surface topology is sensitive to this relaxation. These results are helpful for understanding the exotic properties of WTe2. (C) 2017 The Japan Society of Applied Physics