Claire Lhuillier

ORDER VERSUS DISORDER IN THE QUANTUM HEISENBERG ANTIFERROMAGNET ON THE KAGOME LATTICE USING EXACT SPECTRA ANALYSIS

A group-symmetry analysis of the low-lying levels of the spin-1/2 kagome Heisenberg antiferromagnet is performed for small samples up to

SPIN LIQUID IN THE MULTIPLE-SPIN EXCHANGE MODEL ON THE TRIANGULAR LATTICE : 3HE ON GRAPHITE

N=27

Two-dimensional quantum antiferromagnets

. This approach allows one to follow the effect of quantum fluctuations when the sample size increases. The results contradict the scenario of ``order by disorder which has been advanced on the basis of large-

Magnetothermodynamics of the spin- 1 / 2 Kagome antiferromagnet

S

From Neel long-range order to spin liquids in the multiple-spin exchange model

calculations. A large enough second-neighbor ferromagnetic exchange coupling is needed to stabilize the

Kagome antiferromagnet: a chiral topological spin liquid?

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Two-step restoration of SU(2) symmetry in a frustrated ring-exchange magnet.

pattern: the finite-size analysis indicates a quantum critical transition at a nonzero coupling.

Gapless chiral spin liquid in a kagome Heisenberg model

Using exact diagonalizations, we investigate the

Lattice symmetries and regular magnetic orders in classical frustrated antiferromagnets

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Specific heat and Curie temperature evaluation on triangular lattice: Exchange frequencies for3He adsorbed on grafoil, evaluated by path integral techniques

phase diagram of the multiple-spin exchange (MSE) model on the triangular lattice, we find a transition separating a ferromagnetic phase from a nonmagnetic gapped spin liquid phase. Systems far enough from the ferromagnetic transition have a metamagnetic behavior with magnetization plateaus at