Mechanism of ground-state selection in the frustrated molecular spin cluster V15

  title={Mechanism of ground-state selection in the frustrated molecular spin cluster V15},
  author={Gr{\'e}gory Chaboussant and Stefan T Ochsenbein and Andreas Sieber and Hans U. Guedel and Hannu Mutka and Andreas Mueller and Bernard Barbara},
We report an inelastic neutron scattering (INS) study under a magnetic field on the frustrated molecular spin cluster V15. Several field-dependent transitions are observed and provide a comprehensive understanding of the low-energy quantum spin states. The energy gap 2Δ0 ≈ 27(3) μeV between the two lowest S = 1/2 Kramers doublets is unambiguously attributed to a symmetry lowering of the cluster. The INS data are mapped onto an S = 1/2 Antiferromagnetic Heisenberg triangle with scalene… 

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