0_5360 WTe₂ is a transition metal dichalcogenide (TMD) that crystallizes in the 1T’ structure - a distortion of the 1T phase creating 1D zig-zag chains of metal atoms. First-principles calculations predict a semimetallic bulk [1] and spectroscopic measurements of monolayer WTe₂ grown on conductors report an insulator with average bandgap in the range 10-100 meV [2,3], while electronic transport measurements of WTe₂ grown on insulators reveal an insulating bulk with dissipationless edge states that persist up to 100 K [1,3]. New evidence [4,5] suggests the bandgap is not only topological, but excitonic in origin, implying WTe₂ is an interaction-driven insulator. To shed light on the nature of WTe₂ bandgap, we carried out scanning tunnelling microscopy and spectroscopy experiments at ultra-low temperatures (1.2K) and in the presence of a magnetic field up to 3 T. We discuss the spatial modulation of the local density of states as observed via scanning tunneling spectroscopy[2,6] in terms of formation of electron-hole pairs and charge density waves[2] or quasi-particle interference[6].References[1] X. Qian et al., Science 346, 1344–1347 (2014).[2] Z.-Y.Jia et al., Physical Review B 96, 041108 (2017).[3] S. Wu et al., Science, vol. 359, no. 6371, pp. 76–79 (2018)[4] Y. Jia et al., Nature Physics 18, 87 (2021).[5] B. Sun et al., Nature Physics 18, 94 (2021).[6] Y.-H. Song et al., Nature Communications 9, 4071 (2018).