130 citations · 482 across the 23 of their papers we have counts for
23 papers
Nuclear magnetic resonance line shapes of Wigner crystals in C-enriched graphene
R. Côté, Jean-Michel Parent
Assuming that the nuclear magnetic resonance (NMR) signal from a C isotope enriched layer of graphene can be made sufficiently intense to be measured, we compute the NMR\ li…
Charge density wave with meronlike spin texture induced by a lateral superlattice in a two-dimensional electron gas
R. Côté, Xavier Bazier-Matte
The combined effect of a lateral square superlattice potential and the Coulomb interaction on the ground state of a two-dimensional electron gas in a perpendicular magnetic field i…
RD-NMR spectra of the crystal states of the two-dimensional electron gas in a quantizing magnetic field
R. Côté, Alexandre M. Simoneau
Transport experiments on the two-dimensional electron gas (2DEG) confined into a semiconductor quantum well and subjected to a quantizing magnetic field have uncovered a rich varie…
Electromagnetic absorption and Kerr effect in quantum Hall ferromagnetic states of bilayer graphene
R. Côté, Manuel Barrette, Élie Bouffard
In a quantizing magnetic field, the chiral two-dimensional electron gas in Landau level of bilayer graphene goes through a series of phase transitions at integer filling fact…
Ising quantum Hall ferromagnetism in Landau levels of bilayer graphene
Wenchen Luo, R. Côté, Alexandre Bédard-Vallée
A magnetic field applied perpendicularly to the chiral two-dimensional electron gas (C2DEG)\ in a Bernal-stacked bilayer graphene quantizes the kinetic energy into a discrete set o…
Validity of the two-band model of bilayer and trilayer graphene in a magnetic field
R. Côté, Manuel Barrette
The eigenstates of an electron in the chiral two-dimensional electron gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer graphene is a spinor with or co…
Zeeman coupling and screening corrections to skyrmion excitations in graphene
Wenchen Luo, R. Côté
At half filling of the fourfold degenerate Landau levels |n| \geq 1 in graphene, the ground states are spin polarized quantum Hall states that support spin skyrmion excitations for…
Quantum Hall to charge-density-wave phase transitions in ABC-trilayer graphene
Yafis Barlas, R. Cote, Maxime Rondeau
ABC-stacked trilayer graphene's chiral band structure results in three () Landau level orbitals with zero kinetic energy. This unique feature has important consequences on…
Bilayer graphene as an helical quantum Hall ferromagnet
R. Cote, J. P. Fouquet, Wenchen Luo
The two-dimensional electron gas in a bilayer graphene in the Bernal stacking supports a variety of uniform broken-symmetry ground states in Landau level N=0 at integer filling fac…
Orbital and interlayer Skyrmions crystals in bilayer graphene
R. Cote, Wenchen Luo, Branko Petrov +2
A graphene bilayer in a transverse magnetic field has a set of Landau levels with energies where is the effective cyclotron…
Orbital order in bilayer graphene at filling factor
R. Côté, Jules Lambert, Yafis Barlas +1
In a graphene bilayer with Bernal stacking both and orbital Landau levels have zero kinetic energy. An electronic state in the N=0 Landau level consequently has three q…
Anomalous Exciton-Condensation in Graphene Bilayers
Yafis Barlas, Rene Côté, J. Lambert +1
In ordinary semiconductor bilayers, exciton condensates appear at total Landau level filling factor . We predict that similar states will occur in Bernal stacked graphene…
Solitonic Excitations in Linearly Coherent Channels of Bilayer Quantum Hall Stripes
C. B. Doiron, R. Côté, H. A. Fertig
In some range of interlayer distances, the ground state of the two-dimensional electron gas at filling factor nu =4N+1 with N=0,1,2,... is a coherent stripe phase in the Hartree-Fo…
Replica study of pinned bubble crystals
R. Côté, Mei-Rong Li, A. Faribault +1
In higher Landau levels (), the ground state of the two-dimensional electron gas in a strong perpendicular magnetic field evolves from a Wigner crystal for small filling o…
Commensurate-incommensurate transitions of quantum Hall stripe states in double-quantum-well systems
R. Cote, H. A. Fertig, J. Bourassa +1
In higher Landau levels (N>0) and around filling factors nu =4N+1, a two-dimensional electron gas in a double-quantum-well system supports a stripe groundstate in which the electro…
Dynamics of quantum Hall stripes in double-quantum-well systems
R. Cote, H. A. Fertig
The collective modes of stripes in double layer quantum Hall systems are computed using the time-dependent Hartree-Fock approximation. It is found that, when the system possesses s…
Optical absorption in the soliton-lattice state of a double-quantum-well system
R. Cote
When the separation between layers in a double-quantum-well system is sufficiently small, the ground state of the two-dimensional electron gas at filling factor 1 has an interwell…
Collective Modes of Quantum Hall Stripes
R. Cote, H. A. Fertig
The collective modes of striped phases in a quantum Hall system are computed using the time-dependent Hartree-Fock approximation. Uniform stripe phases are shown to be unstable to…
Collective Excitations, NMR, and Phase Transitions in Skyrme Crystals
R. Cote, A. H. MacDonald, Luis Brey +3
At Landau level filling factors near nu =1, quantum Hall ferromagnets form a Skyrme crystal state with quasi-long-range translational and non-collinear magnetic order. We develop a…
Internal Excitations and Dissipative Damping of Quantum Hall Skyrmions
H. A. Fertig, L. Brey, R. Cote +1
We propose an intrinsic maximum speed for dissipationless E cross B drift of Skyrmion quasiparticles in quantum Hall ferromagnets. When this speed is exceeded, Skyrmions can radiat…
Spin-ordering and magnon collective modes for two-dimensional electron lattices in strong magnetic fields
R. Cote, A. H. MacDonald
We study the spin-ordering and the magnon collective modes of the two-dimensional Wigner crystal state at strong magnetic fields. Our work is based on the Hartree-Fock approximatio…
Collective Modes of Soliton-Lattice States in Double-Quantum-Well Systems
R. Cote, L. Brey, H. Fertig +1
In strong perpendicular magnetic fields double-quantum-well systems can sometimes occur in unusual broken symmetry states which have interwell phase coherence in the absence of int…
Spiral Magnets as Gapless Mott Insulators
R. Cote, A. -M. S. Tremblay
In the large limit, the ground state of the half-filled, nearest-neighbor Hubbard model on the triangular lattice is the three-sublattice antiferromagnet. In sharp contrast wit…