Bernard Bernu
University of Paris
63 Papers
357 Citations
Bernard Bernu is an academic researcher from University of Paris. The author has contributed to research in topics: Quantum spin liquid & Antiferromagnetism. The author has an hindex of 26, co-authored 58 publications. Previous affiliations of Bernard Bernu include Paris West University Nanterre La Défense & Pierre-and-Marie-Curie University.
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Papers
Exact spectra, spin susceptibilities, and order parameter of the quantum Heisenberg antiferromagnet on the triangular lattice
TL;DR: It is shown how suitable boundary conditions, which do not frustrate N\'eel order, allow the study of samples with N=3p+1 spins, and a thorough study of these situations is done in parallel with the more conventional case N= 3p.
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First excitations of the spin 1/2 Heisenberg antiferromagnet on the kagomé lattice
Ch. Waldtmann,H. U. Everts,Bernard Bernu,Claire Lhuillier,Philippe Sindzingre,Philippe Lecheminant,L. Pierre +6 more
TL;DR: In this paper, the exact low energy spectra of the spin 1/2 Heisenberg antiferromagnet on small samples of the kagome lattice of up to N=36 sites were studied.
440
Kapellasite: A Kagome Quantum Spin Liquid with Competing Interactions
B. Fåk,E. Kermarrec,Laura Messio,Bernard Bernu,Claire Lhuillier,Fabrice Bert,Philippe Mendels,Philippe Mendels,B. Koteswararao,F. Bouquet,Jacques Ollivier,Adrian D. Hillier,Anthony A. Amato,R. H. Colman,Andrew S. Wills +14 more
TL;DR: Kapellasite, Cu3Zn(OH)6Cl2, a geometrically frustrated spin-1/2 kagome antiferromagnet polymorphic with herbertsmithite, is a gapless spin liquid showing unusual dynamic short-range correlations of noncoplanar cuboc2 type which persist down to 20 mK.
Spin-liquid phase of the multiple-spin exchange Hamiltonian on the triangular lattice
TL;DR: In this paper, an exact diagonalization study of the spin-liquid phase of the multiple-spin exchange model on a triangular lattice was performed, and it was shown that the system is probably not a chiral spin liquid.
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