Realization of an ideal Weyl semimetal band in a quantum gas with 3D spin-orbit coupling

doi:10.1126/science.abc0105

GSTDTAP > 气候变化

DOI	10.1126/science.abc0105
	Realization of an ideal Weyl semimetal band in a quantum gas with 3D spin-orbit coupling
	Zong-Yao Wang; Xiang-Can Cheng; Bao-Zong Wang; Jin-Yi Zhang; Yue-Hui Lu; Chang-Rui Yi; Sen Niu; Youjin Deng; Xiong-Jun Liu; Shuai Chen; Jian-Wei Pan
	2021-04-16
发表期刊	Science
出版年	2021
英文摘要	Many compounds have now been identified as Weyl semimetals, materials with an unusual electronic band structure characterized by the so-called Weyl points. Weyl points always appear in pairs, but the solid-state materials studied so far have at least four. Wang et al. engineered a Weyl semimetallic state with the minimum number of Weyl points (two) in a gas of ultracold atoms trapped in an optical lattice (see the Perspective by Goldman and Yefsah). To do that, the researchers had to create three-dimensional spin-orbit coupling in this system. The relative simplicity of the resulting band structure will make it easier to observe the unusual effects associated with this state. Science , this issue p. [271][1]; see also p. [234][2] Weyl semimetals are three-dimensional (3D) gapless topological phases with Weyl cones in the bulk band. According to lattice theory, Weyl cones must come in pairs, with the minimum number of cones being two. A semimetal with only two Weyl cones is an ideal Weyl semimetal (IWSM). Here we report the experimental realization of an IWSM band by engineering 3D spin-orbit coupling for ultracold atoms. The topological Weyl points are clearly measured via the virtual slicing imaging technique in equilibrium and are further resolved in the quench dynamics. The realization of an IWSM band opens an avenue to investigate various exotic phenomena that are difficult to access in solids. [1]: /lookup/doi/10.1126/science.abc0105 [2]: /lookup/doi/10.1126/science.abg0892
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/322894
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Zong-Yao Wang,Xiang-Can Cheng,Bao-Zong Wang,et al. Realization of an ideal Weyl semimetal band in a quantum gas with 3D spin-orbit coupling[J]. Science,2021.
APA	Zong-Yao Wang.,Xiang-Can Cheng.,Bao-Zong Wang.,Jin-Yi Zhang.,Yue-Hui Lu.,...&Jian-Wei Pan.(2021).Realization of an ideal Weyl semimetal band in a quantum gas with 3D spin-orbit coupling.Science.
MLA	Zong-Yao Wang,et al."Realization of an ideal Weyl semimetal band in a quantum gas with 3D spin-orbit coupling".Science (2021).