Inelastic neutron scattering study of a nearly isolated s=1/2 triangular system KBa3Ca4Cu3V7O28
KBa3Ca4Cu3V7O28 provides a nice example of quasi-isolated spin 1/2 equilateral triangles, showing magnetic short range ordering at very low temperature. From an NMR study, the intradimer exchange interaction would yield two quadruplets states separated by about 20-30 meV, while the lowest quadruplet would be splitted in two doublets due to a Dzyaloshinskii-Moriya interaction of about 0.1 meV. As a result, the magnetic short range ordering would correspond to a chiral spin configuration below the corresponding temperature of about 1.1 K. Two related proposals have been submitted in the Autumn 2018 proposal round to study both the magnetic short range correlations on D7 (5-32-868) and the low energy magnetic excitations on IN6-Sharp (4-05-736). The former was accepted but not the latter. Nevertheless, the subcommittee members of college 4 have strongly advised us to submit an EASY proposal on IN5, in order to first check the energy range of interest, hence this submission.
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GRENIER Beatrice; MANGIN-THRO Lucile; OLLIVIER Jacques; PETIT Sylvain and SIMONET Virginie. (2019). Inelastic neutron scattering study of a nearly isolated s=1/2 triangular system KBa3Ca4Cu3V7O28. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.EASY-397
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