Chasing ghosts in reciprocal space - a novel inelastic neutron multiple scattering process

We have discovered that a recently reported weak excitation branch in the spin-Peierls material CuGeO3 is in fact a ghost image of the primary magnetic excitation shifted in reciprocal space by a novel multiple scattering process. A model is developed that predicts the occurrence of such multiple scattering and accounts for the observations in CuGeO3. New 'ghostons' can occur when the magnetic unit cell is smaller than the structural, while mixing of intensities from different reciprocal space zones jeopardize accurate polarisation analysis and the study of weak modes in general. (C) 2004 Elsevier B.V. All rights reserved.


Published in:
Physica B-Condensed Matter, 350, 1-3, 11-16
Year:
2004
ISSN:
0921-4526
Keywords:
Note:
Univ Chicago, NEC Labs, Chicago, IL 60637 USA. Princeton Univ, NEC Labs, Princeton, NJ 08544 USA. CEA, MDN, SPSMS, DRFMC, F-38054 Grenoble, France. CNRS, Cristallog Lab, F-38042 Grenoble, France. Ronnow, HM, Swiss Fed Inst Technol, CH-5232 Villigen, Switzerland. henrik.ronnow@psi.ch
Laboratories:




 Record created 2007-01-24, last modified 2018-03-17


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