title: Robust Type-II Weyl Semimetal Phase in Transition Metal Diphosphides XP_{2} (X=Mo, W).
abstract: The recently discovered type-II Weyl points appear at the boundary between electron and hole pockets. Type-II Weyl semimetals that host such points are predicted to exhibit a new type of chiral anomaly and possess thermodynamic properties very different from their type-I counterparts. In this Letter, we describe the prediction of a type-II Weyl semimetal phase in the transition metal diphosphides MoP_{2} and WP_{2}. These materials are characterized by relatively simple band structures with four pairs of type-II Weyl points. Neighboring Weyl points have the same chirality, which makes the predicted topological phase robust with respect to small perturbations of the crystalline lattice. In addition, this peculiar arrangement of the Weyl points results in long topological Fermi arcs, thus making them readily accessible in angle-resolved photoemission spectroscopy.
authors.affiliation: Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.|National Centre for Computational Design and Discovery of Novel Materials MARVEL, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: G
authors.initials: G
authors.lastname: Autès
authors.affiliation: Theoretical Physics and Station Q Zurich, ETH Zurich, 8093 Zurich, Switzerland.
authors.forename: D
authors.initials: D
authors.lastname: Gresch
authors.affiliation: Theoretical Physics and Station Q Zurich, ETH Zurich, 8093 Zurich, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Troyer
authors.affiliation: Theoretical Physics and Station Q Zurich, ETH Zurich, 8093 Zurich, Switzerland.|Department of Physics, St. Petersburg State University, St. Petersburg 199034, Russia.
authors.forename: A A
authors.initials: AA
authors.lastname: Soluyanov
authors.affiliation: Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.|National Centre for Computational Design and Discovery of Novel Materials MARVEL, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: O V
authors.initials: OV
authors.lastname: Yazyev