Evidence of Topological Surface State in Three-Dimensional Dirac Semimetal Cd3As2
文献类型：期刊论文
| 作者 | Yi, HM ; Wang, ZJ ; Chen, CY ; Shi, YG ; Feng, Y ; Liang, AJ ; Xie, ZJ ; He, SL ; He, JF ; Peng, YY ; Liu, X ; Liu, Y ; Zhao, L ; Liu, GD ; Dong, XL ; Zhang, J ; Nakatake, M ; Arita, M ; Shimada, K ; Namatame, H ; Taniguchi, M ; Xu, ZY ; Chen, CT ; Dai, X ; Fang, Z ; Zhou, XJ |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2014 |
| 卷号 | 4 |
| ISSN号 | 2045-2322 |
| 通讯作者 | Zhou, XJ (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | The three-dimensional topological semimetals represent a new quantum state of matter. Distinct from the surface state in the topological insulators that exhibits linear dispersion in two-dimensional momentum plane, the three-dimensional semimetals host bulk band dispersions linearly along all directions. In addition to the gapless points in the bulk, the three-dimensional Weyl/Dirac semimetals are also characterized by "topologically protected" surface state with Fermi arcs on their surface. While Cd3As2 is proposed to be a viable candidate of a Dirac semimetal, more investigations are necessary to pin down its nature. In particular, the topological surface state, the hallmark of the three-dimensional semimetal, has not been observed in Cd3As2. Here we report the electronic structure of Cd3As2 investigated by angle-resolved photoemission measurements on the (112) crystal surface and detailed band structure calculations. The measured Fermi surface and band structure show a good agreement with the band structure calculations with two bulk Dirac-like bands approaching the Fermi level and forming Dirac points near the Brillouin zone center. Moreover, the topological surface state with a linear dispersion approaching the Fermi level is identified for the first time. These results provide experimental indications on the nature of topologically non-trivial three-dimensional Dirac cones in Cd3As2. |
| 资助信息 | National Natural Science Foundation of China [91021006, 10974239, 11174346, 11274367]; Ministry of Science and Technology of China [2011CB921703, 2013CB921700, 2013CB921904] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59699]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yi, HM,Wang, ZJ,Chen, CY,et al. Evidence of Topological Surface State in Three-Dimensional Dirac Semimetal Cd3As2[J]. SCIENTIFIC REPORTS,2014,4. |
| APA | Yi, HM.,Wang, ZJ.,Chen, CY.,Shi, YG.,Feng, Y.,...&Zhou, XJ.(2014).Evidence of Topological Surface State in Three-Dimensional Dirac Semimetal Cd3As2.SCIENTIFIC REPORTS,4. |
| MLA | Yi, HM,et al."Evidence of Topological Surface State in Three-Dimensional Dirac Semimetal Cd3As2".SCIENTIFIC REPORTS 4(2014). |
入库方式： OAI收割
来源：物理研究所
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