Tomonaga–Luttinger liquid in the edge channels of a quantum spin Hall insulator

@article{Sthler2019TomonagaLuttingerLI,
  title={Tomonaga–Luttinger liquid in the edge channels of a quantum spin Hall insulator},
  author={Raul St{\"u}hler and F. Reis and T. M{\"u}ller and Tobias Helbig and Tilman Schwemmer and Ronny Thomale and J{\"o}rg Sch{\"a}fer and Ralph Claessen},
  journal={Nature Physics},
  year={2019},
  volume={16},
  pages={47-51}
}
Quantum spin Hall insulators are two-dimensional materials that host conducting helical electron states strictly confined to the one-dimensional boundaries. These edge channels are protected by time-reversal symmetry against single-particle backscattering, opening new avenues for spin-based electronics and computation. However, the effect of the interelectronic Coulomb repulsion also has to be taken into account, as two-particle scattering is not impeded by topological protection and may… 

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