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DOI	10.1126/science.aaz3480
	Observation and control of maximal Chern numbers in a chiral topological semimetal
	Schröter N.B.M.; Stolz S.; Manna K.; de Juan F.; Vergniory M.G.; Krieger J.A.; Pei D.; Schmitt T.; Dudin P.; Kim T.K.; Cacho C.; Bradlyn B.; Borrmann H.; Schmidt M.; Widmer R.; Strocov V.N.; Felser C.
发表日期	2020
ISSN	10959203
起始页码	179
结束页码	183
卷号	369 期号:6500
英文摘要	Topological semimetals feature protected nodal band degeneracies characterized by a topological invariant known as the Chern number (C). Nodal band crossings with linear dispersion are expected to have at most [Formula: see text], which sets an upper limit to the magnitude of many topological phenomena in these materials. Here, we show that the chiral crystal palladium gallium (PdGa) displays multifold band crossings, which are connected by exactly four surface Fermi arcs, thus proving that they carry the maximal Chern number magnitude of 4. By comparing two enantiomers, we observe a reversal of their Fermi-arc velocities, which demonstrates that the handedness of chiral crystals can be used to control the sign of their Chern numbers. Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.
关键词	article chirality controlled study crystal enantiomer handedness velocity
语种	英语
来源机构	Science (New York, N.Y.)
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133348
推荐引用方式 GB/T 7714	Schröter N.B.M.,Stolz S.,Manna K.,et al. Observation and control of maximal Chern numbers in a chiral topological semimetal[J]. Science (New York, N.Y.),2020,369(6500).
APA	Schröter N.B.M..,Stolz S..,Manna K..,de Juan F..,Vergniory M.G..,...&Felser C..(2020).Observation and control of maximal Chern numbers in a chiral topological semimetal.,369(6500).
MLA	Schröter N.B.M.,et al."Observation and control of maximal Chern numbers in a chiral topological semimetal".369.6500(2020).