Weyl semimetal in a topological insulator multilayer.
By A. Burkov, L. Balents. Physical Review Letters, 2011
1,589 citations recorded by the source corpus.
We propose a simple realization of the three-dimensional (3D) Weyl semimetal phase, utilizing a multilayer structure, composed of identical thin films of a magnetically doped 3D topological insulator, separated by ordinary-insulator spacer layers. We show that the phase diagram of this system contains a Weyl semimetal phase of the simplest possible kind, with only two Dirac nodes of opposite chirality, separated in momentum space, in its band structure. This Weyl semimetal has a finite anomalous Hall conductivity and chiral edge states and occurs as an intermediate phase between an ordinary insulator and a 3D quantum anomalous Hall insulator. We find that the Weyl semimetal has a nonzero dc conductivity at zero temperature, but Drude weight vanishing as T(2), and is thus an unusual metallic phase, characterized by a finite anomalous Hall conductivity and topologically protected edge states.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/913a9aaed79048b73cec489253877f8a033280df
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Citations in the corpus
- Topological Semimetals from First Principles (2018, background): “To achieve this, Burkov and Balents proposed a heterostructure of alternating layers of magnetically doped topological insulator and normal insulator (89).”
- Novel effects of strains in graphene and other two dimensional materials (2015, background): “Most of the new topological materials (graphene, topological insulators and superconductors, Weyl semimetals [40, 352]) share the property that their low energy electronic properties are described by Dirac fermions [107, 346] in one, two or three spacial dimensions enlarging and widening the bridge ”
- Recent developments in transport phenomena in Weyl semimetals (2013, background): “Alternately stacking topological and ferromagnetic insulators was shown to produce inversion symmetric WSMs in a certain parameter regime with Weyl nodes separated along the stacking direction (Burkov and Balents [3]), while replacing the ferromagnetic insulators with trivial, time-reversal symmetri”