Instability and topological robustness of Weyl semimetals against Coulomb interaction
arXiv:1709.09316 · doi:10.1103/PhysRevB.96.195160
Abstract
There is a close connection between various new phenomena in Weyl semimetals and the existence of linear band crossings in the single particle description. We show, by a full self-consistent mean-field calculation, how this picture is modified in the presence of long-range Coulomb interactions. The chiral symmetry breaking occurs at strong enough interactions and the internode interband excitonic pairing channel is found to be significant, which determines the gap-opened band profile varying with interaction strength. Remarkably, in the resultant interacting phase, finite band Chern number jumps in the three-dimensional momentum space are retained, indicating the robustness of the topologically nontrivial features.
8 pages, 4 figures, accepted by Phys. Rev. B
References in corpus (14)
- The Chiral Magnetic Effect
- Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
- Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
- Topological response in Weyl semimetals and the chiral anomaly
- Dirac Strings and Magnetic Monopoles in Spin Ice Dy2Ti2O7
- Chiral anomaly and transport in Weyl metals
- Chiral anomaly, Charge Density Waves, and Axion Strings from Weyl Semimetals
- Tunable magnon Weyl points in ferromagnetic pyrochlores
- Collective coherence in planar semiconductor microcavities
- Theory of photoinduced Floquet Weyl semimetal phases
- Electric transport in three-dimensional Skyrmion/monopole crystal
- Long-range interaction induced phases in Weyl semimetals
- Microscopic Theory of Equilibrium Polariton Condensates
- Possible particle-hole instabilities in interacting type-II Weyl semimetals
Cited by in corpus (5)
- Topological phases of an interacting Majorana Benalcazar-Bernevig-Hughes model
- Spin density wave order in interacting type-I and type-II Weyl semimetals
- Theory of phonon instabilities in Weyl semimetals at high magnetic fields
- Spin susceptibilities in magnetic type-I and type-II Weyl semimetals
- Axionic Instability of Periodic Weyl-Semimetal Superstructures