Stable Weyl points and trivial surface states in carrier compensated semimetal WP2

The possible relation between the extremely large magneto-resistance (XMR) and the presence of Weyl points has recently drawn a lot of attention in the study of topological semimetals. Here we combine angle-resolved photoemission spectroscopy and density functional theory calculations to identify both surface and bulk electronic states in WP2. While the surface is uncompensated, our results show the bulk-band structure of WP2 is particle hole-compensated and it is compatible with the presence of at least 4 Weyl points, confirming its topological nature.