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|Title:||Signatures of a time-reversal symmetric Weyl semimetal with only four Weyl points||Authors:||Belopolski, Ilya
Sanchez, Daniel S.
Zhang, Songtian S.
Hasan, M. Zahid
Ab Initio Calculation
|Issue Date:||2017||Source:||Belopolski, I., Yu, P., Sanchez, D. S., Ishida, Y., Chang, T.-R., Zhang, S. S., et al. (2017). Signatures of a time-reversal symmetric Weyl semimetal with only four Weyl points. Nature Communications, 8(1), 942-.||Series/Report no.:||Nature Communications||Abstract:||Through intense research on Weyl semimetals during the past few years, we have come to appreciate that typical Weyl semimetals host many Weyl points. Nonetheless, the minimum nonzero number of Weyl points allowed in a time-reversal invariant Weyl semimetal is four. Realizing such a system is of fundamental interest and may simplify transport experiments. Recently, it was predicted that TaIrTe4 realizes a minimal Weyl semimetal. However, the Weyl points and Fermi arcs live entirely above the Fermi level, making them inaccessible to conventional angle-resolved photoemission spectroscopy (ARPES). Here, we use pump-probe ARPES to directly access the band structure above the Fermi level in TaIrTe4. We observe signatures of Weyl points and topological Fermi arcs. Combined with ab initio calculation, our results show that TaIrTe4 is a Weyl semimetal with the minimum number of four Weyl points. Our work provides a simpler platform for accessing exotic transport phenomena arising in Weyl semimetals.||URI:||https://hdl.handle.net/10356/89528
|ISSN:||2041-1723||DOI:||10.1038/s41467-017-00938-1||Schools:||School of Electrical and Electronic Engineering
School of Materials Science & Engineering
|Research Centres:||Research Techno Plaza||Rights:||© 2017 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||MSE Journal Articles|
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