Effects of long-range interactions on topological semimetals

In the presence of long-range interactions the low energy dynamics in a metal usually undergoes significant re-adjustments, leading to a state that qualitatively differs from that in the non-interacting limit. The band structures of many three dimensional systems host topologically protected nodal-points or nodal-lines. In such semimetals long-range interactions play an important role in both the native phase, and upon tuning to a topological or geometric quantum critical point. Here we study the interplay of long-range interactions and topology in a nodal-point semimetal.