Journal article
Tunable topological Weyl semimetal from simple-cubic lattices with staggered fluxes
Physical Review A, Vol.85(3)
Mar/2012
Abstract
Three-dimensional Weyl fermions are found to emerge from simple-cubic lattices with staggered fluxes. The mechanism is a gapping of the quadratic-band touching by time-reversal-symmetry-breaking hoppings. The system exhibits a rich phase diagram where the number of Weyl fermions and their topological charges are tunable via plaquette fluxes. The Weyl semimetal state is shown to be the intermediate phase between a nontopological semimetal and a quantum anomalous Hall insulator. The transitions between those phases can be understood through the evolution of the Weyl points as Berry-flux insertion processes. As the Weyl points move and split (or merge) through tuning of the plaquette fluxes, the Fermi arcs and surface states undergo significant manipulation. We also propose a possible scheme to realize the model in ultracold fermions in optical lattices with artificial gauge fields.
Details
- Title
- Tunable topological Weyl semimetal from simple-cubic lattices with staggered fluxes
- Creators
- Jian Hua Jiang (null) - The Weizmann Institute of Science
- Resource Type
- Journal article
- Publication Details
- Physical Review A, Vol.85(3); Mar/2012
- Number of pages
- 7
- Language
- English
- DOI
- https://doi.org/10.1103/PhysRevA.85.033640
- Grant note
- German Federal Ministry of Education and Research (BMBF); Israel Science Foundation (ISF)Work at the Weizmann Institute was supported by the German Federal Ministry of Education and Research (BMBF) within the framework of the German-Israeli cooperation project (DIP) and by the Israel Science Foundation (ISF). I thank Zhong Fang, Xi Dai, Jonathan Ruhman, and Zohar Ringel for illuminating discussions and comments._ALMAME_DELIMITER_
- Scientific Unit
- The Weizmann Institute of Science
- Record Identifier
- 993267484803596
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