期刊
PHYSICAL REVIEW B
卷 95, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.014306
关键词
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资金
- Nanyang Technological University
- Singapore Ministry of Education [MOE2015-T2-1-070, MOE2011-T3-1-005]
The recent discovery of the Lorentz symmetry-violating type-II Weyl semimetal phase has renewed interest in the study of Weyl physics in condensed-matter systems. However, tuning the exceptional properties of this novel state has remained a challenge. Optical lattices, created using standing laser beams, provide a convenient platform to tune tunneling parameters continuously in time. In this paper, we propose a generalized two level system exhibiting type-II Weyl points that can be realized using ultracold atoms in an optical lattice. The system is engineered using a three-dimensional lattice with complex p phase tunneling amplitudes. Various unique properties of the type-IIWeyl semimetal such as open Fermi surface, anomalous chirality, and topological Fermi arcs can be probed using the proposed optical lattice scheme.
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