Publications associated with Quantum Magnetism and Quantum Phase Transitions

Neutron scattering from deconfined spinons in the 2D frustrated quantum magnet Cs<inf>2</inf>CuCl<inf>4</inf>

Journal of Magnetism and Magnetic Materials 272-276 (2004)

R Coldea, DA Tennant, Z Tylczynski

High-resolution inelastic neutron scattering is used to explore the magnetic excitations in Cs 2 CuCl 4 , a quasi-2D spin-5 frustrated Heisenberg antiferromagnet on an anisotropic triangular lattice. In the spin liquid phase above the 3D ordering transition a broad continuum of excited states is observed, characteristic of excitations of pairs of spin-1/2 spinons of a resonating-valence-bond state. In the ordered phase stabilized at low temperatures by the weak inter-layer couplings a sharp spin-wave mode emerges below the continuum lower boundary. © 2004 Published by Elsevier B.V.

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