Dowsing for nodal lines in a topological semimetal [Physics]

In PNAS, Shao et al. (1) report a spectroscopic search for line degeneracies in the electronic bands of NbAs2, a topological semimetal (TSM). TSMs have attracted great interest recently as exemplars of the emergent physics that can arise in quantum condensed matter (2). They host quasiparticle excitations that cannot occur...

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