P T -invariant Weyl semimetals in gauge-symmetric systems
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P T -invariant Weyl semimetals in gauge-symmetric systems. / Lepori, L.; Fulga, I. C.; Trombettoni, A.; Burrello, M.
In: Physical Review B, Vol. 94, No. 8, 01.08.2016, p. 85107.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - P T -invariant Weyl semimetals in gauge-symmetric systems
AU - Lepori, L.
AU - Fulga, I. C.
AU - Trombettoni, A.
AU - Burrello, M.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - Weyl semimetals typically appear in systems in which either time-reversal (T ) or inversion (P ) symmetry is broken. Here we show that in the presence of gauge potentials these topological states of matter can also arise in fermionic lattices preserving both T and P . We analyze in detail the case of a cubic lattice model with π fluxes, discussing the role of gauge symmetries in the formation of Weyl points and the difference between the physical and the canonical T and P symmetries. We examine the robustness of this P T -invariant Weyl semimetal phase against perturbations that remove the chiral sublattice symmetries, and we discuss further generalizations. Finally, motivated by advances in ultracold-atom experiments and by the possibility of using synthetic magnetic fields, we study the effect of random perturbations of the magnetic fluxes, which can be compared to a local disorder in realistic scenarios.
AB - Weyl semimetals typically appear in systems in which either time-reversal (T ) or inversion (P ) symmetry is broken. Here we show that in the presence of gauge potentials these topological states of matter can also arise in fermionic lattices preserving both T and P . We analyze in detail the case of a cubic lattice model with π fluxes, discussing the role of gauge symmetries in the formation of Weyl points and the difference between the physical and the canonical T and P symmetries. We examine the robustness of this P T -invariant Weyl semimetal phase against perturbations that remove the chiral sublattice symmetries, and we discuss further generalizations. Finally, motivated by advances in ultracold-atom experiments and by the possibility of using synthetic magnetic fields, we study the effect of random perturbations of the magnetic fluxes, which can be compared to a local disorder in realistic scenarios.
U2 - 10.1103/PhysRevB.94.085107
DO - 10.1103/PhysRevB.94.085107
M3 - Journal article
VL - 94
SP - 85107
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 8
ER -
ID: 184607130