Discovery of a Three-Dimensional Topological Dirac Semimetal, Na 3 Bi
SLAC National Accelerator Laboratory · Lawrence Berkeley National Laboratory · +6 more institutions
Abstract
Three-dimensional (3D) topological Dirac semimetals (TDSs) represent an unusual state of quantum matter that can be viewed as "3D graphene." In contrast to 2D Dirac fermions in graphene or on the surface of 3D topological insulators, TDSs possess 3D Dirac fermions in the bulk. By investigating the electronic structure of Na3Bi with angle-resolved photoemission spectroscopy, we detected 3D Dirac fermions with linear dispersions along all momentum directions. Furthermore, we demonstrated the robustness of 3D Dirac fermions in Na3Bi against in situ surface doping. Our results establish Na3Bi as a model system for 3D TDSs, which can serve as an ideal platform for the systematic study of quantum phase transitions…
Citation impact
- FWCI
- 149.30
- Percentile
- 100%
- References
- 41
Authors
12- ZKZ. K. LiuCorresponding
SLAC National Accelerator Laboratory
- BZBo ZhouCorresponding
Lawrence Berkeley National Laboratory, Clarendon College, University of Oxford
- YZYi Zhang
Lawrence Berkeley National Laboratory
- ZWZhijun Wang
Chinese Academy of Sciences, Institute of Physics
- HWHongming Weng
Chinese Academy of Sciences, Collaborative Innovation Center of Quantum Matter, Institute of Physics
Topics & keywords
- Dirac fermion
- Topological insulator
- Physics
- Graphene
- Semimetal
- Fermion
- Dirac (video compression format)
- Helical Dirac fermion