Helical quantum Hall phase in graphene on SrTiO3

Tuning electron interactions by substrate engineering

Staff : Benjamin Sacépé, Hermann Sellier
Postdoc : Louis Veyrat
Student : Alexis Coissard, Corentin Deprez, Marco Guerra, Hadrien Vignaud

Tuning the Coulomb-induced Landau level degeneracy splitting using a high-k dielectric SrTiO3 substrate leads us to the observation of helical edge transport at nu = 0





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References :
Helical quantum Hall phase in graphene on SrTiO3
L. Veyrat, C. Déprez, A. Coissard, X. Li, F. Gay, K. Watanabe, T. Taniguchi, Z. V. Han, B. A. Piot, H. Sellier, and B. Sacépé
arXiv:1907.02299 (2019)


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