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Revisiting (higher order and crystalline) topology in old models of lead telluride
Iñigo Robredo, Maia G. Vergniory, Barry Bradlyn
In this work, we revisit the model of PbTe presented in [E. Fradkin, E. Dagotto, and D. Boyanovsky, Phys. Rev. Lett. 57, 2967 (1986)]. We show that the low energy theory of this mo…
Chiral Topological Semimetal with Multifold Band Crossings and Long Fermi arcs
Niels B. M. Schröter, Ding Pei, Maia G. Vergniory +14
Topological semimetals in crystals with a chiral structure (which possess a handedness due to a lack of mirror and inversion symmetries) are expected to display numerous exotic phy…
Highly-ordered wide bandgap materials for quantized anomalous Hall and magnetoelectric effects
Mikhail M. Otrokov, Tatiana V. Menshchikova, Maia G. Vergniory +8
An interplay of spin-orbit coupling and intrinsic magnetism is known to give rise to the quantum anomalous Hall and topological magnetoelectric effects under certain conditions. Th…
Instability of the topological surface state in BiSe upon deposition of gold
A. Polyakov, C. Tusche, M. Ellguth +10
Momentum resolved photoemission spectroscopy indicates the instability of the Dirac surface state upon deposition of gold on the (0001) surface of the topological insulator BiS…
On the possibility of magnetic Weyl fermions in non-symmorphic compound PtFeSb
M. G. Vergniory, L. Elcoro, F. Orlandi +5
Weyl fermions are expected to exhibit exotic physical properties such as the chiral anomaly, large negative magnetoresistance or Fermi arcs. Recently a new platform to realize thes…
Chiral Optical Response of Multifold Fermions
Felix Flicker, Fernando de Juan, Barry Bradlyn +3
Multifold fermions are generalizations of two-fold degenerate Weyl fermions with three-, four-, six- or eight-fold degeneracies protected by crystal symmetries, of which only the l…