中国物理B ›› 2018, Vol. 27 ›› Issue (1): 17105-017105.doi: 10.1088/1674-1056/27/1/017105
• SPECIAL TOPIC—Non-equilibrium phenomena in soft matters • 上一篇 下一篇
Guang-Hao Hong(洪光昊), Cheng-Wei Wang(王成玮), Juan Jiang(姜娟), Cheng Chen(陈成), Sheng-Tao Cui(崔胜涛), Hai-Feng Yang(杨海峰), Ai-Ji Liang(梁爱基), Shuai Liu(刘帅), Yang-Yang Lv(吕洋洋), Jian Zhou(周健), Yan-Bin Chen(陈延彬), Shu-Hua Yao(姚淑华), Ming-Hui Lu(卢明辉), Yan-Feng Chen(陈延峰), Mei-Xiao Wang(王美晓), Le-Xian Yang(杨乐仙), Zhong-Kai Liu(柳仲楷), Yu-Lin Chen(陈宇林)
Guang-Hao Hong(洪光昊)1,2,4, Cheng-Wei Wang(王成玮)3,4, Juan Jiang(姜娟)2,5,6, Cheng Chen(陈成)7, Sheng-Tao Cui(崔胜涛)2, Hai-Feng Yang(杨海峰)2, Ai-Ji Liang(梁爱基)2, Shuai Liu(刘帅)2, Yang-Yang Lv(吕洋洋)8, Jian Zhou(周健)8, Yan-Bin Chen(陈延彬)8, Shu-Hua Yao(姚淑华)8, Ming-Hui Lu(卢明辉)8, Yan-Feng Chen(陈延峰)8, Mei-Xiao Wang(王美晓)2, Le-Xian Yang(杨乐仙)9, Zhong-Kai Liu(柳仲楷)2, Yu-Lin Chen(陈宇林)2,7,9
摘要:
Dirac semimetals are materials in which the conduction and the valence bands have robust crossing points protected by topology or symmetry. Recently, a new type of Dirac semimetals, so called the Dirac line-node semimetals (DLNSs), have attracted a lot of attention, as they host robust Dirac points along the one-dimensional (1D) lines in the Brillouin zone (BZ). In this work, using angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations, we systematically investigated the electronic structures of non-symmorphic ZrSiS crystal where we clearly distinguished the surface states from the bulk states. The photon-energy-dependent measurements further prove the existence of Dirac line node along the X-R direction. Remarkably, by in situ surface potassium doping, we clearly observed the different evolutions of the bulk and surface electronic states while proving the robustness of the Dirac line node. Our studies not only reveal the complete electronic structures of ZrSiS, but also demonstrate the method manipulating the electronic structure of the compound.
中图分类号: (Electron density of states and band structure of crystalline solids)