Spin dynamics in dimers of entangled Cr7Ni rings
Supramolecular complexes containing linked molecular nanomagnets (antiferromagnetic rings) have been demonstrated to display entanglement and to be excellent candidates for quantum infgormation processing. So far coupling and entanglement have only been demonstrated indirectly by macroscopic techniques like susceptibility or by fitting model hamiltonians to Electron Paramagnetic Resonance data. Inelastic neutron scattering can provide a much more direct characterization of the form of the coupling and of the associated ring-ring entanglement. In particular, the full pattern of real-space dynamical correlation functions between pairs of individual atomic spins can be extracted from INS data by exploiting the position-sensitive detectors of IN5. we propose to study a supramolecular complex of two Cr7Ni rings linked through pyrazine. By applying an exernal field it will be possible to switch the ground-state structure from entangled to factorized, an to extract the resulting modification of the spin dynamics.
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SANTINI Paolo; AMORETTI Giuseppe; ANSBRO Simon; BAKER Michael; CARRETTA Stefano; CHIESA Alessandro; GUIDI Tatiana; MUTKA Hannu; TIMCO Grigore; WHITEHEAD George; WINPENNY Richard E.P. and WOOLFSON Robert. (2013). Spin dynamics in dimers of entangled Cr7Ni rings. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-04-457
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