Paper

Observation of Fermi Arcs in Non-Centrosymmetric Weyl Semi-Metal Candidate NbP*

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©2015 Chinese Physical Society and IOP Publishing Ltd
, , Citation Di-Fei Xu et al 2015 Chinese Phys. Lett. 32 107101 DOI 10.1088/0256-307X/32/10/107101

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Author e-mails

xgwan@nju.edu.cn

dlfeng@fudan.edu.cn

Author affiliations

1 State Key Laboratory of Surface Physics, Department of Physics, and Laboratory of Advanced Materials, Fudan University, Shanghai 200433

2 Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433

3 National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and College of Physics, Nanjing University, Nanjing 210093

4 Department of Physics, Zhejiang University, Hangzhou 310027

5 State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027

6 Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom

7 Zhejiang California International NanoSystems Institute, Zhejiang University, Hangzhou 310027

8 Collaborative Innovation Centre of Advanced Microstructures, Nanjing 210093

Author notes

9 These authors contributed equally to this work.

Dates

  1. Received 10 September 2015
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0256-307X/32/10/107101

Abstract

We report the surface electronic structure of niobium phosphide NbP single crystal on (001) surface by vacuum ultraviolet angle-resolved photoemission spectroscopy. Combining with our first principle calculations, we identify the existence of the Fermi arcs originated from topological surface states. Furthermore, the surface states exhibit circular dichroism pattern, which may correlate with its non-trivial spin texture. Our results provide critical evidence for the existence of the Weyl Fermions in NbP, which lays the foundation for further research.

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Footnotes

  • * 

    Supported by the National Natural Science Foundation of China under Grant Nos 11174124, 11274068, 11374137, 11421404 and 13ZR1451700, and the National Basic Research Program of China (973 Program) under Grant No 2012CB921402.

10.1088/0256-307X/32/10/107101