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research article

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

Ronnow, H. M.  
•
Regnault, L. P.
•
Lorenzo, J. E.
2004
Physica B-Condensed Matter

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.

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Type
research article
DOI
10.1016/j.physb.2004.04.048
Author(s)
Ronnow, H. M.  
•
Regnault, L. P.
•
Lorenzo, J. E.
Date Issued

2004

Published in
Physica B-Condensed Matter
Volume

350

Issue

1-3

Start page

11

End page

16

Subjects

inelastic neutron scattering

•

copper germanate CuGeO3

•

neutron

•

polarisation analysis

•

PEIERLS COMPOUND CUGEO3

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

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LQM  
Available on Infoscience
January 24, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/239941
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