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- W2093986670 abstract "Itinerant electrons in a two-dimensional kagome lattice form a Dirac semimetal, similar to graphene. When lattice and spin symmetries are broken by various periodic perturbations this semimetal is shown to spawn interesting nonmagnetic insulating phases. These include a two-dimensional topological insulator with a nontrivial ${text{Z}}_{2}$ invariant and robust gapless edge states, as well as dimerized and trimerized ``Kekul'e'' insulators. The latter two are topologically trivial but the Kekul'e phase possesses a complex order parameter with fractionally charged vortex excitations. A charge-density wave is shown to couple to the Dirac fermions as an effective axial gauge field." @default.
- W2093986670 created "2016-06-24" @default.
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- W2093986670 date "2009-09-25" @default.
- W2093986670 modified "2023-10-09" @default.
- W2093986670 title "Topological insulator on the kagome lattice" @default.
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- W2093986670 doi "https://doi.org/10.1103/physrevb.80.113102" @default.
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