  We performed a series of high-pressure synchrotron X-ray diffraction (XRD)
and resistance measurements on the Weyl semimetal NbAs. The crystal structure
remains stable up to 26 GPa according to the powder XRD data. The resistance of
NbAs single crystal increases monotonically with pressure at low temperature.
Up to 20 GPa, no superconducting transition is observed down to 0.3 K. These
results show that the Weyl semimetal phase is robust in NbAs, and applying
pressure is not a good way to get a topological superconductor from a Weyl
semimetal.
