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- W2514537112 abstract "Topological Lifshitz phase transition characterizes an abrupt change of the topology of the Fermi surface through a continuous deformation of parameters. Recently, Lifshitz transition has been predicted to separate two types of Weyl points: type-I and type-II (or called structured Weyl points), which has attracted considerable attention in various fields. Although recent experimental investigation has seen a rapid progress on type-II Weyl points, it still remains a significant challenge to observe their characteristic Lifshitz transition. Here, we propose a scheme to realize both type-I and type-II Weyl points in three-dimensional ultracold atomic gases by introducing an experimentally feasible configuration based on current spin-orbit coupling technology. In the resultant Hamiltonian, we find three degenerate points: two Weyl points carrying a Chern number $ensuremath{-}1$ and a fourfold degenerate point carrying a Chern number 2. Remarkably, by continuous tuning of a convenient experimental knob, all these degenerate points can transition from type-I to type-II, thereby providing an ideal platform to study different types of Weyl points and directly probe their Lifshitz phase transition." @default.
- W2514537112 created "2016-09-16" @default.
- W2514537112 creator A5014876751 @default.
- W2514537112 creator A5054229359 @default.
- W2514537112 date "2016-11-21" @default.
- W2514537112 modified "2023-10-14" @default.
- W2514537112 title "Type-II Weyl points in three-dimensional cold-atom optical lattices" @default.
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- W2514537112 doi "https://doi.org/10.1103/physreva.94.053619" @default.
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