New type of Weyl semimetal with quadratic double Weyl fermions

Journal Article · 18 January 2016 · Proceedings of the National Academy of Sciences of the United States of America

DOI: https://doi.org/10.1073/pnas.1514581113 · OSTI ID:1236659

Huang, Shin-Ming ^[1]; Xu, Su-Yang ^[2]; Belopolski, Ilya ^[2]; Lee, Chi-Cheng ^[1]; Chang, Guoqing ^[1]; Chang, Tay-Rong ^[3]; Wang, BaoKai ^[4]; Alidoust, Nasser ^[2]; Bian, Guang ^[2]; Neupane, Madhab ^[2]; Sanchez, Daniel ^[2]; Zheng, Hao ^[2]; Jeng, Horng-Tay ^[5]; Bansil, Arun ^[6]; Neupert, Titus ^[7]; Lin, Hsin ^[1]; Hasan, M. Zahid ^[2]

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1. Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore 117546,, Department of Physics, National University of Singapore, Singapore 117542,
2. Joseph Henry Laboratory, Department of Physics, Princeton University, Princeton, NJ 08544,
3. Joseph Henry Laboratory, Department of Physics, Princeton University, Princeton, NJ 08544,, Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan,, Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544,
4. Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore 117546,, Department of Physics, National University of Singapore, Singapore 117542,, Department of Physics, Northeastern University, Boston, MA 02115,
5. Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan,, Institute of Physics, Academia Sinica, Taipei 11529, Taiwan,
6. Department of Physics, Northeastern University, Boston, MA 02115,
7. Princeton Center for Theoretical Science, Princeton University, Princeton, NJ 08544

Significance We predict a new Weyl semimetal candidate. This is critically needed for this rapidly developing field as TaAs is the only known Weyl semimetal in nature. We show that SrSi ₂ has many new and novel properties not possible in TaAs. Our prediction provides a new route to studying the elusive Weyl fermion particles originally considered in high-energy physics by tabletop experiments.

• Research Organization: Princeton Univ., Princeton, NJ (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: AC02-05CH11231; FG02-05ER46200; FG02-07ER46352
• OSTI ID: 1236659
• Journal Information: Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 5 Vol. 113; ISSN 0027-8424
• Publisher: Proceedings of the National Academy of SciencesCopyright Statement
• Country of Publication: United States
• Language: English