Signatures of a time-reversal symmetric Weyl semimetal with only four Weyl points

Ilya Belopolski (), Peng Yu, Daniel S. Sanchez, Yukiaki Ishida, Tay-Rong Chang, Songtian S. Zhang, Su-Yang Xu, Hao Zheng, Guoqing Chang, Guang Bian, Horng-Tay Jeng, Takeshi Kondo, Hsin Lin, Zheng Liu, Shik Shin and M. Zahid Hasan ()
Additional contact information
Ilya Belopolski: Princeton University
Peng Yu: Nanyang Technological University
Daniel S. Sanchez: Princeton University
Yukiaki Ishida: University of Tokyo
Tay-Rong Chang: National Tsing Hua University
Songtian S. Zhang: Princeton University
Su-Yang Xu: Princeton University
Hao Zheng: Princeton University
Guoqing Chang: National University of Singapore
Guang Bian: Princeton University
Horng-Tay Jeng: National Tsing Hua University
Takeshi Kondo: University of Tokyo
Hsin Lin: National University of Singapore
Zheng Liu: Nanyang Technological University
Shik Shin: University of Tokyo
M. Zahid Hasan: Princeton University

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: 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.

Date: 2017
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-017-00938-1 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00938-1

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-017-00938-1

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().