Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/89528
Title: Signatures of a time-reversal symmetric Weyl semimetal with only four Weyl points
Authors: Belopolski, Ilya
Yu, Peng
Sanchez, Daniel S.
Ishida, Yukiaki
Chang, Tay-Rong
Zhang, Songtian S.
Xu, Su-Yang
Zheng, Hao
Chang, Guoqing
Bian, Guang
Jeng, Horng-Tay
Kondo, Takeshi
Lin, Hsin
Liu, Zheng
Shin, Shik
Hasan, M. Zahid
Keywords: Topology
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
http://hdl.handle.net/10220/44971
ISSN: 2041-1723
DOI: http://dx.doi.org/10.1038/s41467-017-00938-1
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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