• Publications
  • Influence
Single photon emitters in exfoliated WSe2 structures.
Complete optical micro-spectroscopy studies of thin layers of tungsten diselenide (WSe2), a representative semiconducting dichalcogenide with a bandgap in the visible spectral range, discover centres that, at low temperatures, give rise to sharp emission lines (100 μeV linewidth).
Cloning of Dirac fermions in graphene superlattices
Graphene superlattices such as this one provide a way of studying the rich physics expected in incommensurable quantum systems and illustrate the possibility of controllably modifying the electronic spectra of two-dimensional atomic crystals by varying their crystallographic alignment within van der Waals heterostuctures.
Brightening of dark excitons in monolayers of semiconducting transition metal dichalcogenides
We present low temperature magneto-photoluminescence experiments which demonstrate the brightening of dark excitons by an in-plane magnetic field $B$ applied to monolayers of different semiconducting
Observation of three-dimensional massless Kane fermions in a zinc-blende crystal
Graphene and topological-insulator surfaces are well known for their two-dimensional conic electronic dispersion relation. Now three-dimensional hyperconic dispersion is shown for electrons in a
Few-layer graphene on SiC, pyrolitic graphite, and graphene: A Raman scattering study
To show the similarities between exfoliated graphene and epitaxial few layer graphite (FLG) layers, we present micro-Raman scattering measurements on three different graphite-based materials:
Landau level spectroscopy of ultrathin graphite layers.
Far infrared transmission experiments are performed on ultrathin epitaxial graphite samples in a magnetic field. The observed cyclotron resonance-like and electron-positron-like transitions are in
Thermal conductivity of graphene in corbino membrane geometry.
The concluded value of the heat conductivity coefficient kappa approximately 600 W/(m.K) is smaller than previously reported but still validates the conclusion that graphene is a very good thermal conductor.
Intrinsic terahertz plasmons and magnetoplasmons in large scale monolayer graphene.
It is shown that in graphene epitaxially grown on SiC the Drude absorption is transformed into a strong terahertz plasmonic peak due to natural nanoscale inhomogeneities, such as substrate terraces and wrinkles, which makes graphene a unique playground for plasMon-controlled magneto-optical phenomena.
Approaching the dirac point in high-mobility multilayer epitaxial graphene.
Multilayer epitaxial graphene is investigated using far infrared transmission experiments in the different limits of low magnetic fields and high temperatures, finding the well-defined Landau level quantization up to room temperature at magnetic fields below 1 T, a phenomenon unusual in solid state systems.