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26 April 2024 |
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Frustration induced Raman scattering in CuGeO_3 | | V. N. Muthukumar
; Claudius Gros
; Wolfgang Wenzel
; Roser Valenti
; P. Lemmens
; B. Eisener
; G. Güntherodt
; M. Weiden
; C. Geibel
; F. Steglich
; | | Date: |
23 Aug 1996 | | Journal: | Phys. Rev. B, Vol.54, R9635 (1996) | | Subject: | cond-mat | | Affiliation: | Dortmund), Claudius Gros(Dortmund), Wolfgang Wenzel(Dortmund), Roser Valenti(Dortmund), P. Lemmens(Aachen), B. Eisener(Aachen), G. Güntherodt(Aachen), M. Weiden(Darmstadt), C. Geibel(Darmstadt), F. Steglich(Darmstadt | | Abstract: | We present experimental data for the Raman intensity in the spin-Peierls compound CuGeO_3 and theoretical calculations from a one-dimensional frustrated spin model. The theory is based on (a) exact diagonalization and (b) a recently developed solitonic mean field theory. We find good agreement between the 1D-theory in the homogeneous phase and evidence for a novel dimerization of the Raman operator in the spin-Peierls state. Finally we present evidence for a coupling between the interchain exchange, the spin-Peierls order parameter and the magnetic excitations along the chains. | | Source: | arXiv, cond-mat/9608106 | | Services: | Forum | Review | PDF | Favorites | |
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