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Magneto-optics of quasi-relativistic electrons in tilted Dirac cones in graphene and -(BEDT-TTF)I
Judit Sári, Mark O. Goerbig, Csaba Toke
Massless Dirac fermions occur as low-energy modes in several quasi-two-dimensional condensed matter systems such as graphene, the surface of bulk topological insulators, and in lay…
Magnetoplasmons of the tilted-anisotropic Dirac cone material (BEDT-TTF)I
Judit Sári, Csaba Toke, Mark O. Goerbig
We study the collective modes of a low-energy continuum model of the quasi-two-dimensional electron liquid in a layer of the organic compound (BEDT-TTF)I in a perpendic…
Charge-density-wave states in double-layer graphene structures in a high magnetic field
Csaba Toke, Vladimir I. Fal'ko
We study the phases of correlated charge-density waves that form at a high magnetic field in two parallel graphene flakes separated by a thin insulator. The predicted phases includ…
Particle-hole symmetry and bifurcating ground state manifold in the quantum Hall ferromagnetic states of multilayer graphene
Csaba Toke
The orbital structure of the quantum Hall ferromagnetic states in the zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA, etc.\ stackings) is determined by the e…
Theory of inter-Landau level magnetoexcitons in bilayer graphene
Judit Sari, Csaba Toke
If bilayer graphene is placed in a high perpendicular magnetic field, several quantum Hall plateaus are observed at low enough temperatures. Of these, the sequence…
The effect of the electron-electron interaction on the Lifshitz transition density in bilayer graphene
Csaba Toke, Vladimir I. Fal'ko
We study the renormalization of the effective mass and trigonal warping of bilayer graphene by the electron-electron interaction. One consequence of such a renormalization in the l…
States of interacting composite fermions at Landau level fillig
Csaba Toke, Chuntai Shi, Jainendra K. Jain
There is increasing experimental evidence for fractional quantum Hall effect at filling factor . Modeling it as a system of composite fermions, we study the problem of int…
Theoretical study of even denominator fractions in graphene: Fermi sea versus paired states of composite fermions
Csaba Toke, Jainendra K. Jain
The physics of the state at even denominator fractional fillings of Landau levels depends on the Coulomb pseudopotentials, and produces, in different GaAs Landau levels, a composit…
Numerical studies of the Pfaffian model of the nu=5/2 fractional quantum Hall effect
Csaba Toke, Nicolas Regnault, Jainendra K. Jain
The Pfaffian model has been proposed for the fractional quantum Hall effect (FQHE) at nu=5/2. We examine it for the quasihole excitations by comparison with exact diagonalization r…
SU(4) composite fermions in graphene: New fractional quantum Hall states
Csaba Toke, Jainendra K. Jain
Theoretical studies of the fractional quantum Hall effect (FQHE) in graphene have so far focused on the plausibility and stability of the previously known FQHE states for the inter…
Nature of excitations of the 5/2 fractional quantum Hall effect
Csaba Toke, Nicolas Regnault, Jainendra K. Jain
It is shown, with the help of exact diagonalization studies on systems with up to sixteen electrons, in the presence of up to two delta function impurities, that the Pfaffian model…
Understanding the 5/2 Fractional Quantum Hall Effect without the Pfaffian Wave Function
Csaba Toke, Jainendra K. Jain
It is demonstrated that an understanding of the 5/2 fractional quantum Hall effect can be achieved within the composite fermion theory without appealing to the Pfaffian wave functi…
Fractional Quantum Hall Effect in the Second Landau Level: the Importance of Inter-Composite-Fermion Interaction
Csaba Toke, Michael R. Peterson, Gun Sang Jeon +1
Exact diagonalization of a two-dimensional electron gas in a strong magnetic field in the disk geometry shows that there exists a filling factor range in the second Landau level wh…