Type-II Weyl semimetals proposed by the team of Matthias Troyer

A team of researchers of Professor Matthias Troyer, group leader in MARVEL, and professor for Computational Physics at the Institute for Theoretical Physics at ETH Zurich, propose the existence of a previously overlooked type of Weyl fermion.

The researchers discovered a type-II Weyl point, which appears at the contact of electron and hole pockets in type-II Weyl semimetals. They predicted that tungsten telluride (WTe2) is an example of a topological semimetal hosting the new particle as a low-energy excitation around such a type-II Weyl point.  The work has been published on Nature, 527, 495 (2015).