Dynamics of the two-dimensional S=1/2 dimer system (C5H6N2F)2CuCl4
Journal Article
·
· Physical Review B
- ORNL
- Paul Scherrer Institut, Villigen, Switzerland
- Clark University
- CEA, Grenoble, France
- Institut Laue-Langevin (ILL)
- ETH Zurich, Switzerland
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 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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1009482
- Journal Information:
- Physical Review B, Vol. 83, Issue 5; ISSN 1098--0121
- Country of Publication:
- United States
- Language:
- English
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