Publication Date:
2016-04-22
Description:
Author(s): S. Souma, Zhiwei Wang, H. Kotaka, T. Sato, K. Nakayama, Y. Tanaka, H. Kimizuka, T. Takahashi, K. Yamauchi, T. Oguchi, Kouji Segawa, and Yoichi Ando Weyl semimetals (WSMs) provide a platform to realize long-sought massless Weyl fermions, which can host a variety of exotic quantum phenomena such as chiral anomalies and anomalous Hall conductivity. The most intriguing nature of WSMs is the emergence of an unconventional surface state called a Fermi arc, which is distinct from the well-known Fermi surface of ordinary metals. The authors have used angle-resolved photoemission spectroscopy on NbP and succeeded in observing the electronic states for two differently terminated surfaces of this noncentrosymmetric crystal. Corroborated by first-principles calculations, it is unambiguously demonstrated that NbP is a Weyl semimetal with reduced spin-orbit coupling, exhibiting a drastic difference in the Fermi-surface topology between the P- and Nb-terminated surfaces. Through a direct comparison of Fermi-arc surface states between the two surfaces, the momentum location of Weyl nodes has been elucidated. The present results provides a pathway for exploring new quantum phenomena utilizing Fermi-arc properties of WSMs. [Phys. Rev. B 93, 161112(R)] Published Wed Apr 20, 2016
Keywords:
Electronic structure and strongly correlated systems
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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