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pro vyhledávání: '"Lhuillier, Claire"'
We consider some classical and frustrated lattice spin models with global O(3) spin symmetry. There is no general analytical method to find a ground-state if the spin dependence of the Hamiltonian is more than quadratic (i.e. beyond the Heisenberg mo
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a7fd9457748dcd1b86516b4125d4ec0
Autor:
Laeuchli, Andreas, Lhuillier, Claire
We determine dynamical response functions of the S=1/2 Heisenberg quantum antiferromagnet on the kagome lattice based on large-scale exact diagonalizations combined with a continued fraction technique. The dynamical spin structure factor has importan
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http://arxiv.org/abs/0901.1065
http://arxiv.org/abs/0901.1065
Autor:
Lhuillier, Claire
A description of different phases of two dimensional magnetic insulators is given. The first chapters are devoted to the understanding of the symmetry breaking mechanism in the semi-classical Neel phases. Order by disorder selection is illustrated. A
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Motivated by recent experiments on an S=1/2 antiferromagnet on the kagome lattice, we investigate the Heisenberg J1-J2 model with ferromagnetic J1 and antiferromagnetic J2. Classically the ground state displays Neel long range order with 12 non-copla
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https://hal.science/hal-00004291
https://hal.science/hal-00004291
We consider a quantum dimer model (QDM) on the kagome lattice which was introduced recently [Phys. Rev. Lett. 89, 137202 (2002)]. It realizes a Z_2 liquid phase and its spectrum was obtained exactly. It displays a topological degeneracy when the latt
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http://arxiv.org/abs/cond-mat/0410693
http://arxiv.org/abs/cond-mat/0410693
Autor:
Misguich, Gr��goire, Lhuillier, Claire
This review presents some theoretical advances in the field of quantum magnetism in two-dimensional systems, and quantum spin liquids in particular. It is to be published as a chapter in the second edition of the book "Frustrated spin systems", edite
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http://arxiv.org/abs/cond-mat/0310405
http://arxiv.org/abs/cond-mat/0310405
Autor:
Lhuillier, Claire, Misguich, Gregoire
In these lectures we sketch a rapid survey of recent theoretical advances in the study of frustrated quantum magnets with a special emphasis on two dimensional magnets.
LaTeX2e (RevTeX4), 21 pages, 11 figures. Contribution to the lecture notes o
LaTeX2e (RevTeX4), 21 pages, 11 figures. Contribution to the lecture notes o
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http://arxiv.org/abs/cond-mat/0109146
http://arxiv.org/abs/cond-mat/0109146
Autor:
Misguich, Gregoire, Lhuillier, Claire
The extension of the Lieb-Schultz-Mattis theorem to dimensions larger than one is discussed. It is explained why the variational wave-function built by the previous authors is of no help to prove the theorem in dimension larger than one. The short ra
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9866a4801cfab6bb774ef26509e438f2
http://arxiv.org/abs/cond-mat/0002170
http://arxiv.org/abs/cond-mat/0002170