Journal
PHYSICAL REVIEW B
Volume 90, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.125101
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Funding
- CONICET
- Agencia Nacional de Promocion Cientifica y Tecnica of Argentina
- Universidad de Buenos Aires, Ciencia y Tecnica, Argentina
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We consider a natural generalization of the lattice model for a periodic array of two layers, A and B, of spinless electrons proposed by Fu [Phys. Rev. Lett. 106, 106802 (2011)] as a prototype for a crystalline insulator. This model has time-reversal symmetry and broken inversion symmetry. We show that when the intralayer next-nearest-neighbor hoppings t(2)(a), a = A, B vanish, this model supports a Weyl semimetal phase for a wide range of the remaining model parameters. When the effect of t(2)(a) is considered, topological crystalline insulating phases take place within the Weyl semimetal one. By mapping to an effective Weyl Hamiltonian we derive some analytical results for the phase diagram as well as for the structure of the nodes in the spectrum of the Weyl semimetal.
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