Dynamics of the two-dimensional S=1/2 dimer system (C5H6N2F)2CuCl4

Abstract

Inelastic neutron scattering was used to study a quantum S=1/2 antiferromagnetic Heisenberg system-Bis(2-amino-5-fluoropyridinium) Tetrachlorocuprate(II). The magnetic excitation spectrum was shown to be dominated by long-lived excitations with an energy gap as 1.07(3) meV. The measured dispersion relation is consistent with a simple two-dimensional square lattice of weakly-coupled spin dimers. Comparing the data to a random phase approximation treatment of this model gives the intra-dimer and inter-dimer exchange constants J=1.45(2) meV and J'=0.31(3) meV, respectively.

4 pages, 4 figures

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Cited by in corpus (4)

• Crystals for neutron scattering studies of quantum magnetism
• Control of entanglement transitions in quantum spin clusters
• Structural and magnetic properties in the quantum S=1/2 dimer systems Ba3(Cr1-xVx)2O8 with site disorder
• Dynamics and field-induced order in the layered spin $S=1/2$ dimer system (C${}_5$H${}_6$N${}_2$F)${}_2$CuCl${}_4$