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Hierarchy of Hofstadter states and replica quantum Hall ferromagnetism in graphene superlattices
G. L. Yu, R. V. Gorbachev, J. S. Tu +16
Self-similarity and fractals have fascinated researchers across various disciplines. In graphene placed on boron nitride and subjected to a magnetic field, self-similarity appears…
Interaction phenomena in graphene seen through quantum capacitance
G. L. Yu, R. Jalil, Branson Belle +12
Capacitance measurements provide a powerful means of probing the density of states. The technique has proved particularly successful in studying 2D electron systems, revealing a nu…
Cloning of Dirac fermions in graphene superlattices
L. A. Ponomarenko, R. V. Gorbachev, G. L. Yu +15
Lateral superlattices have attracted major interest as this may allow one to modify spectra of two dimensional electron systems and, ultimately, create materials with tailored elec…
Cross-sectional imaging of individual layers and buried interfaces of graphene-based heterostructures and superlattices
S. J. Haigh, A. Gholinia, R. Jalil +7
By stacking various two-dimensional (2D) atomic crystals [1] on top of each other, it is possible to create multilayer heterostructures and devices with designed electronic propert…
How close can one approach the Dirac point in graphene experimentally?
Alexander S. Mayorov, Daniel C. Elias, Ivan S. Mukhin +5
The above question is frequently asked by theorists who are interested in graphene as a model system, especially in context of relativistic quantum physics. We offer an experimenta…
Interaction-Driven Spectrum Reconstruction in Bilayer Graphene
A. S. Mayorov, D. C. Elias, M. Mucha-Kruczynski +8
The nematic phase transition in electronic liquids, driven by Coulomb interactions, represents a new class of strongly correlated electronic ground states. We studied suspended sam…
Dirac cones reshaped by interaction effects in suspended graphene
D. C. Elias, R. V. Gorbachev, A. S. Mayorov +8
We report measurements of the cyclotron mass in graphene for carrier concentrations n varying over three orders of magnitude. In contrast to the single-particle picture, the real s…
Control of graphene's properties by reversible hydrogenation
D. C. Elias, R. R. Nair, T. M. G. Mohiuddin +8
Graphene - a monolayer of carbon atoms densely packed into a hexagonal lattice - has one of the strongest possible atomic bonds and can be viewed as a robust atomic-scale scaffold,…
Observation of Distinct Electron-Phonon Couplings in Gated Bilayer Graphene
L. M. Malard, D. C. Elias, E. S. Alves +1
A Raman study of a back gated bilayer graphene sample is presented. The changes in the Fermi level induced by charge transfer splits the Raman G-band, hardening its higher componen…
Giant Intrinsic Carrier Mobilities in Graphene and Its Bilayer
S. V. Morozov, K. S. Novoselov, M. I. Katsnelson +4
We have studied temperature dependences of electron transport in graphene and its bilayer and found extremely low electron-phonon scattering rates that set the fundamental limit on…