When doubly-degenerate band crossings known as Kramers nodal lines intersect the Fermi level, they form exotic three-dimensional Fermi surfaces composed of massless Dirac fermions. Here, the authors present evidence that the 3R polytypes of TaS2 and NbS2 are Kramers nodal line metals with open octdong and spindle-torus Fermi surfaces, respectively.
- Gabriele Domaine
- Moritz M. Hirschmann
- Niels B. M. Schröter