Atomic-Scale Visualization of Quasiparticle Interference on a Type-II Weyl Semimetal Surface
Year: 2016
Type: article
Abstract: We combine quasiparticle interference simulation (theory) and atomic resolution scanning tunneling spectromicroscopy (experiment) to visualize the interference patterns on a type-II Weyl semimetal Mo_{x}W_{1-x}Te_{2} for the first time. Our simulation based on first-principles band topology theoretically reveals the surface electron scattering behavior. We identify the topological Fermi arc states and reveal the scattering properties of the surface states in Mo_{0.66}W_{0.34}Te_{2}. In addition, our result reveals an experimental signature of the topology via the interconnectivity of bulk and surface states, which is essential for understanding the unusual nature of this material.
Source: Physical Review Letters
Institutions: Princeton University, National University of Singapore, Peking University, National Tsing Hua University, Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Nanjing University, Institute of Physics, Academia Sinica, Northeastern University, Collaborative Innovation Center of Quantum Matter
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, Gordon and Betty Moore Foundation, National Energy Research Scientific Computing Center, National Research Foundation Singapore, National Natural Science Foundation of China, Academia Sinica, Northeastern University, Ministry of Science and Technology, Taiwan, National Tsing Hua University, Office of Science, Materials Research Science and Engineering Center, Harvard University, National Key Research and Development Program of China, Basic Energy Sciences
Awards: Princeton Center for Complex Materials, G2404979533, G2684293934, G42916606, G447619342, G4999472602, G5278913660, 奇异混合原子团簇的构筑、物性调控及相关量子过程研究, G5727253366, M. Zahid Hasan Experimental Investigator in Quantum Materials Award, 外尔半金属的拓扑表面电子态研究, Topological Electronic Structure in Strong Spin-Orbit Coupled Materials, G854546781
OpenAlex ID: W2563550327