  The discovery of Weyl fermions in transition metal monoarsenides/phosphides
without inversion symmetry represents an exceptional breakthrough in modern
condensed matter physics. However, exploring the inherent nature of these
quasiparticles is experimentally elusive because most of the experimental
probes rely on analysing Fermi arc topology or controversial signatures such as
the appearance of the chiral anomaly and the giant magnetoresistance. Here we
show that the prototypical type-I Weyl semimetals TaP and TaAs possess a giant
anomalous Nernst signal with a characteristic saturation plateau beyond a
critical field which can be understood as a direct consequence of the finite
Berry curvature originating from the Weyl points. Our results thus promote the
Nernst coefficient as an ideal bulk probe for detecting and exploring the
fingerprints of emergent Weyl physics.
