Observation of the fractional quantum Hall effect in graphene

  title={Observation of the fractional quantum Hall effect in graphene},
  author={Kirill I. Bolotin and Fereshte Ghahari and Michael D. Shulman and Horst L. Stormer and Philip Kim},
When electrons are confined in two dimensions and subject to strong magnetic fields, the Coulomb interactions between them can become very strong, leading to the formation of correlated states of matter, such as the fractional quantum Hall liquid. In this strong quantum regime, electrons and magnetic flux quanta bind to form complex composite quasiparticles with fractional electronic charge; these are manifest in transport measurements of the Hall conductivity as rational fractions of the… 

Electronic properties of graphene in a strong magnetic field

We review the basic aspects of electrons in graphene (two-dimensional graphite) exposed to a strong perpendicular magnetic field. One of its most salient features is the relativistic quantum Hall

Observation of the fractional quantum Hall effect in an oxide.

The present study represents a technological advance in oxide electronics that provides opportunities to explore strongly correlated phenomena in quantum transport of dilute carriers in MgZnO/ ZnO heterostructures grown by molecular-beam epitaxy.

From the Integer to the Fractional Quantum Hall Effect in Graphene

The fractional quantum Hall effect is a very particular manifestation of electronic correlations in two-dimensional systems in a strong perpendicular magnetic field. It arises as a consequence of a

Helical quantum Hall phase in graphene on SrTiO3

Transport measurements in graphene indicate edge states similar to those in 2D topological insulators, and this versatile graphene platform may find applications in spintronics and topological quantum computation.

Magnetic catalysis and quantum Hall ferromagnetism in weakly coupled graphene

We study the realization in a model of graphene of the phenomenon whereby the tendency of gauge-field mediated interactions to break chiral symmetry spontaneously is greatly enhanced in an external

Aspects of the Fractional Quantum Hall Effect in Graphene

We present a brief overview of the nature of the fractional quantum Hall effect (FQHE) in monolayer and bilayer graphene. After a short introduction on the effect and the pseudopotential description

Fractional quantum Hall effect in suspended graphene probed with two-terminal measurements

  • I. SkachkoX. Du E. Andrei
  • Physics
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2010
It is argued that the failure of earlier experiments to detect the integer and fractional quantum Hall effect with a Hall-bar lead geometry is a consequence of the invasive character of voltage probes in mesoscopic samples, which are easily shorted out owing to the formation of hot spots near the edges of the sample.

Quantum Hall effects in graphene-based two-dimensional electron systems

It is explained why graphene and bilayer graphene can be viewed respectively as J D 1 and 2 chiral two-dimensional electron gases (C2DEGs), and why this property frames their quantum Hall physics.

Observation of fractional Chern insulators in a van der Waals heterostructure

The observation of gapped states at fractional fillings of Harper-Hofstadter bands arising from the interplay of a magnetic field and a superlattice potential in a bilayer graphene–hexagonal boron nitride heterostructure is reported.