Report

Helical quantum Hall phase in graphene on SrTiO3

See allHide authors and affiliations

Science  14 Feb 2020:
Vol. 367, Issue 6479, pp. 781-786
DOI: 10.1126/science.aax8201

You are currently viewing the editor's summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

Controlling the interactions

Near charge neutrality and subject to perpendicular magnetic fields, graphene is expected to become a ferromagnet with edge states not unlike those in two-dimensional topological insulators. Observing this effect experimentally has proven tricky because very large magnetic fields are needed to overcome the effect of electron-electron interactions, which drive the system to competing states. Instead of amping up the field, Veyrat et al. placed their graphene samples on a substrate made out of strontium titanate, which effectively screened the interactions. Transport measurements confirmed the formation of the characteristic edge states.

Science, this issue p. 781

View Full Text

Stay Connected to Science