Discovery of a Weyl fermion semimetal and topological Fermi arcs

Su-Yang Xu; Ilya Belopolski; Nasser Alidoust; Madhab Neupane; Guang Bian; Chenglong Zhang; Raman Sankar; Guoqing Chang; Zhujun Yuan; Chi-Cheng Lee; Shin-Ming Huang; Hao Zheng; Jie Ma; Daniel S. Sanchez; BaoKai Wang; Arun Bansil; Fangcheng Chou; Pavel P. Shibayev; Hsin Lin; Shuang Jia; M. Zahid Hasan

doi:10.1126/science.aaa9297

Research Article

Discovery of a Weyl fermion semimetal and topological Fermi arcs

Su-Yang Xu¹,²,*,
Ilya Belopolski¹,*,
Nasser Alidoust¹,²,*,
Madhab Neupane¹,³,*,
Guang Bian¹,
Chenglong Zhang⁴,
Raman Sankar⁵,
Guoqing Chang⁶,⁷,
Zhujun Yuan⁴,
Chi-Cheng Lee⁶,⁷,
Shin-Ming Huang⁶,⁷,
Hao Zheng¹,
Jie Ma⁸,
Daniel S. Sanchez¹,
BaoKai Wang⁶,⁷,⁹,
Arun Bansil⁹,
Fangcheng Chou⁵,
Pavel P. Shibayev¹,¹⁰,
Hsin Lin⁶,⁷,
Shuang Jia⁴,¹¹,
M. Zahid Hasan¹,²,†

¹Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.
²Princeton Center for Complex Materials, Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA.
³Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
⁴International Center for Quantum Materials, School of Physics, Peking University, China.
⁵Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
⁶Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore, 6 Science Drive 2, Singapore 117546.
⁷Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.
⁸Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
⁹Department of Physics, Northeastern University, Boston, MA 02115, USA.
¹⁰Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA.
¹¹Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.

↵†Corresponding author. E-mail: mzhasan{at}princeton.edu

↵* These authors contributed equally to this work.

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Science 07 Aug 2015:
Vol. 349, Issue 6248, pp. 613-617
DOI: 10.1126/science.aaa9297

Su-Yang Xu

1Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.

2Princeton Center for Complex Materials, Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA.

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Ilya Belopolski

1Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.

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Nasser Alidoust

1Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.

2Princeton Center for Complex Materials, Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA.

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Madhab Neupane

1Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.

3Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

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Guang Bian

1Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.

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Chenglong Zhang

4International Center for Quantum Materials, School of Physics, Peking University, China.

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Raman Sankar

5Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.

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Guoqing Chang

6Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore, 6 Science Drive 2, Singapore 117546.

7Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.

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Zhujun Yuan

4International Center for Quantum Materials, School of Physics, Peking University, China.

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Chi-Cheng Lee

6Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore, 6 Science Drive 2, Singapore 117546.

7Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.

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Shin-Ming Huang

6Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore, 6 Science Drive 2, Singapore 117546.

7Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.

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Hao Zheng

1Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.

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Jie Ma

8Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.

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Daniel S. Sanchez

1Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.

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BaoKai Wang

6Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore, 6 Science Drive 2, Singapore 117546.

7Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.

9Department of Physics, Northeastern University, Boston, MA 02115, USA.

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Arun Bansil

9Department of Physics, Northeastern University, Boston, MA 02115, USA.

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Fangcheng Chou

5Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.

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Pavel P. Shibayev

1Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.

10Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA.

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Hsin Lin

6Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore, 6 Science Drive 2, Singapore 117546.

7Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.

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Shuang Jia

4International Center for Quantum Materials, School of Physics, Peking University, China.

11Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.

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M. Zahid Hasan

1Laboratory for Topological Quantum Matter and Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ 08544, USA.

2Princeton Center for Complex Materials, Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA.

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For correspondence: mzhasan@princeton.edu

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Angle-resolved photoemission is used to detect the topological surface states and bulk dispersion of the compound tantalum arsenide. [Also see Report by Lu et al.]

Discovery of a Weyl fermion semimetal and topological Fermi arcs

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