202 citations · 1.8k across the 62 of their papers we have counts for
25 papers · 1 filter
DMRG study of FQHE systems in the open cylinder geometry
G. Misguich, Th. Jolicoeur
The study of the fractional quantum Hall liquid state of two-dimensional electrons requires a non-perturbative treatment of interactions. It is possible to perform exact diagonaliz…
Unconventional parton states at : The role of finite width
William N. Faugno, Tongzhou Zhao, Ajit C. Balram +2
A recent work [Balram, Jain, and Barkeshli, Phys. Rev. Res. , 013349 (2020)] has suggested that an unconventional state describing superconductivity of co…
Quantum Hall Skyrmions at in monolayer graphene
Thierry Jolicoeur, Bradraj Pandey
Monolayer graphene under a strong perpendicular field exhibit quantum Hall ferromagnetism with spontaneously broken spin and valley symmetry. The approximate SU(4) spin/valley symm…
Physics of integer spin antiferromagnetic chains : Haldane gaps and edge states
Thierry Jolicoeur, Olivier Golinelli
The antiferromagnetic Heisenberg spin chain with integer spin has short-range magnetic order and an excitation energy gap above the ground state. This so-called Haldane gap is prop…
Quantum Hall ferroelectric helix in bilayer graphene
Thierry Jolicoeur, Csaba Tőke, Inti Sodemann
We re-examine the nature of the ground states of bilayer graphene at odd integer filling factors within a simplified model of nearly degenerate and Landau levels. Previ…
Bubble phase at for a spinless hollow-core interaction
Grégoire Misguich, Thierry Jolicoeur, Takahiro Mizusaki
We investigate fractional quantum Hall states for model interactions restricted to a repulsive hard-core. When the hard-core excludes relative angular momentum between spinle…
Shape of the magnetoroton at and in real samples
Thierry Jolicoeur
We revisit the theory of the collective neutral excitation mode in the fractional quantum Hall effect at Landau level filling fractions and . We include the effect o…
Phase diagram of a graphene bilayer in the zero-energy Landau level
Angelika Knothe, Thierry Jolicoeur
Bilayer graphene under a magnetic field has an octet of quasidegenerate levels due to spin, valley, and orbital degeneracies. This zero-energy Landau level is resolved into several…
Edge structure of graphene monolayers in the ν = 0 quantum Hall state
Angelika Knothe, Thierry Jolicoeur
Monolayer graphene at neutrality in the quantum Hall regime has many competing ground states with various types of ordering. The outcome of this competition is modified by the pres…
SU(3) and SU(4) singlet quantum Hall states at
Fengcheng Wu, Inti Sodemann, Allan H. MacDonald +1
We report on an exact diagonalization study of fractional quantum Hall states at filling factor in a system with a four-fold degenerate =0 Landau level and SU(4) symmetr…
The Phase Diagram of the Fractional Quantum Hall Effect: Effects of Landau Level Mixing and Non-Zero Width
Kiryl Pakrouski, Michael R. Peterson, Thierry Jolicoeur +3
Interesting non-Abelian states, e.g., the Moore-Read Pfaffian and the anti-Pfaffian, offer candidate descriptions of the fractional quantum Hall state. But the significant…
SO(5) symmetry in the quantum Hall effect in graphene
Fengcheng Wu, Inti Sodemann, Yasufumi Araki +2
Electrons in graphene have four flavors associated with low-energy spin and valley degrees of freedom. The fractional quantum Hall effect in graphene is dominated by long-range Cou…
Many-body study of a quantum point contact in the fractional quantum Hall regime at v=5/2
Paul Soulé, Thierry Jolicoeur, Philippe Lecheminant
We study a quantum point contact in the fractional quantum Hall regime at Landau level filling factors 1/3 and 5/2. By using exact diagonalizations in the cylinder geometry we iden…
Edge properties of principal fractional quantum Hall states in the cylinder geometry
Paul Soulé, Thierry Jolicoeur
We study fractional quantum Hall states in the cylinder geometry with open boundaries. We focus on principal fermionic 1/3 and bosonic 1/2 fractions in the case of hard-core intera…
Exact wavefunctions for excitations of the nu=1/3 fractional quantum Hall state from a model Hamiltonian
Paul Soulé, Thierry Jolicoeur
We study fractional quantum Hall states in the cylinder geometry with open boundaries. By truncating the Coulomb interactions between electrons we show that it is possible to const…
Highest weight Macdonald and Jack Polynomials
Th. Jolicoeur, J. G. Luque
Fractional quantum Hall states of particles in the lowest Landau levels are described by multivariate polynomials. The incompressible liquid states when described on a sphere are f…
On some quantum Hall states with negative flux
Th. Jolicoeur
Some recently observed fractional quantum Hall states are not easily explained in standard hierarchy/composite fermion schemes. This paper gives a brief introduction to some wavefu…
Chiral order in spin-S XY chains
Th. Jolicoeur, Ph. Lecheminant
We consider the issue of chiral ordering in spin chains for an arbitrary value of the spins S. By use of bosonization according to a scheme developped by H.-J. Schulz, we obtain th…
Generalized nonlinear sigma model approach to alternating spin chains and ladders
M. Bocquet, Th. Jolicoeur
We generalize the nonlinear sigma model treatment of quantum spin chains to cases including ferromagnetic bonds. When these bonds are strong enough, the classical ground state is n…
Edge Logarithmic Corrections probed by Impurity NMR
V. Brunel, M. Bocquet, Th. Jolicoeur
Semi-infinite quantum spin chains display spin autocorrelations near the boundary with power-law exponents that are given by boundary conformal field theories. We show that NMR mea…
Incommensurability in the magnetic excitations of the bilinear-biquadratic spin-1 chain
O. Golinelli, Th. Jolicoeur, E. Sorensen
We study the magnetic excitation spectrum of the S=1 quantum Heisenberg spin chain with Hamiltonian : H = sum_i cos(theta) S_i S_i+1 + sin(theta) (S_i S_i+1)^2. We focus on the ran…
Double gap and solitonic excitations in the spin-Peierls chain CuGeO3
M. Ain, J. E. Lorenzo, L. P. Regnault +4
We have studied magnetic excitations in the dimerized spin-Peierls phase of CuGeO3, by high resolution inelastic neutron scattering. We measured the well-defined spin triplet dispe…
Phases of random antiferromagnetic spin-1 chains
C. Monthus, O. Golinelli, Th. Jolicoeur
We formulate a real-space renormalization scheme that allows the study of the effects of bond randomness in the Heisenberg antiferromagnetic spin-1 chain. There are four types of b…
Fullerene anions and pairing in finite systems
Th. Jolicoeur
The pi electrons of isolated fullerene anions C60^{n-} (n betwen 1 and 6) are a quite unique finite system of electrons with an attractive interaction due to exchange of intramolec…