Year: 2018
Type: article
Abstract: Motivated by the proposal of a Weyl-semimetal phase in pyrochlore iridates, we consider a Hubbardtype model on the pyrochlore lattice.To shed light on the question as to why such a state has not been observed experimentally, its robustness is analyzed.On the one hand, we study the possible phases when the system is doped.Magnetic frustration favors several phases with magnetic and charge order that do not occur at half filling, including additional Weyl-semimetal states close to quarter filling.On the other hand, we search for density waves that break translational symmetry and destroy the Weylsemimetal phase close to half filling.The uniform Weyl semimetal is found to be stable, which we attribute to the low density of states close to the Fermi energy.
Source: New Journal of Physics
Authors: Christoph Berke, Paolo Michetti, Carsten Timm
Institutions: University of Cologne, Technische Universität Dresden
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,610
Funder: Deutsche Forschungsgemeinschaft
Award: G936330020
OpenAlex ID: W2772610108