Hyperbolic Weyl point in reciprocal chiral metamaterial
  We report the existence of Weyl points in a class of non-central symmetric metamaterials, which has time reversal symmetry, but does not have inversion symmetry due to chiral coupling between electric and magnetic fields. This class of metamaterial exhibits either type-I or type-II Weyl points depending on its non-local response. We also provide a physical realization of such metamaterial consisting of an array of metal wires in the shape of elliptical helixes which exhibits type-II Weyl points. 
Meng Xiao, Qian Lin and Shanhui Fan
physics.optics cond-mat.mtrl-sci