Observation of surface states derived from topological Fermi arcs in the Weyl semimetal NbP
ORAL
Abstract
The recent experimental discovery of the first Weyl semimetal (WSM) provides the first observation of a Weyl fermion in nature and demonstrates a novel type of anomalous surface state band structure, consisting of Fermi arcs. NbP may realize the first WSM in the limit of weak spin-orbit coupling. Here we study the surface states of NbP by ARPES and we find that we cannot show Fermi arcs based on our experimental data alone. However, the excellent agreement between our data and calculations suggests that NbP is a WSM and that we observe trivial surface states which evolve continuously from topological Fermi arcs above the Fermi level.
*The work at Princeton and Princeton-led ARPES measurements were supported by the Gordon and Betty Moore Foundation EPiQS Initiative through grant GBMF4547 (Hasan) and by the U.S. Department of Energy, DE-FG-02-05ER46200.
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