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Soft phonon columns on the edge of the Brillouin zone in the relaxor PbMg1/3Nb2/3O3
(American Physical Society, 2009-06-10)
We report lattice-dynamical measurements, made using neutron inelastic-scattering methods, of the relaxor perovskite PbMg1/3Nb2/3O3 (PMN) at momentum transfers near the edge of the Brillouin zone. Unusual "columns" of ...