New aspects of the b*-LA phonon of CuGeO3

M. Nishi; K. Kakurai; Y. Fujii; S. Katano; J. Akimitsu; M. Yethiraj; J. A. Fernandez-Baca

doi:10.1016/S0022-3697(99)00062-1

New aspects of the b^*-LA phonon of CuGeO₃

M. Nishi, K. Kakurai, Y. Fujii, S. Katano, J. Akimitsu, M. Yethiraj, J. A. Fernandez-Baca

Research output: Contribution to journal › Conference article › peer-review

6 Citations (Scopus)

Abstract

We performed high resolution measurements of the b^*-LA phonon branch of CuGeO₃ by inelastic neutron scattering. From the results it was clarified that the b^*-LA broad branch reported earlier is composed of two phonon branches with excitation energies very nearby. The second branch close to this b^*-LA mode cannot be assigned in the space group Pbmm and it may indicate that a twisting motion of GeO₄ tetrahedra couples to the b^*-LA mode. This coupling may be an indispensable ingredient for the spin-Peierls transition in CuGeO₃.

Original language	English
Pages (from-to)	1109-1111
Number of pages	3
Journal	Journal of Physics and Chemistry of Solids
Volume	60
Issue number	8
DOIs	https://doi.org/10.1016/S0022-3697(99)00062-1
Publication status	Published - Jan 1 1999
Externally published	Yes
Event	Proceedings of the 1998 7th ISSP International Symposium Frontiers in Neutron Scattering Research (ISSP7) - Tokyo, Jpn Duration: Nov 24 1998 → Nov 27 1998

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "New aspects of the b*-LA phonon of CuGeO3",

abstract = "We performed high resolution measurements of the b*-LA phonon branch of CuGeO3 by inelastic neutron scattering. From the results it was clarified that the b*-LA broad branch reported earlier is composed of two phonon branches with excitation energies very nearby. The second branch close to this b*-LA mode cannot be assigned in the space group Pbmm and it may indicate that a twisting motion of GeO4 tetrahedra couples to the b*-LA mode. This coupling may be an indispensable ingredient for the spin-Peierls transition in CuGeO3.",

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TY - JOUR

T1 - New aspects of the b*-LA phonon of CuGeO3

AU - Nishi, M.

AU - Kakurai, K.

AU - Fujii, Y.

AU - Katano, S.

AU - Akimitsu, J.

AU - Yethiraj, M.

AU - Fernandez-Baca, J. A.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - We performed high resolution measurements of the b*-LA phonon branch of CuGeO3 by inelastic neutron scattering. From the results it was clarified that the b*-LA broad branch reported earlier is composed of two phonon branches with excitation energies very nearby. The second branch close to this b*-LA mode cannot be assigned in the space group Pbmm and it may indicate that a twisting motion of GeO4 tetrahedra couples to the b*-LA mode. This coupling may be an indispensable ingredient for the spin-Peierls transition in CuGeO3.

AB - We performed high resolution measurements of the b*-LA phonon branch of CuGeO3 by inelastic neutron scattering. From the results it was clarified that the b*-LA broad branch reported earlier is composed of two phonon branches with excitation energies very nearby. The second branch close to this b*-LA mode cannot be assigned in the space group Pbmm and it may indicate that a twisting motion of GeO4 tetrahedra couples to the b*-LA mode. This coupling may be an indispensable ingredient for the spin-Peierls transition in CuGeO3.

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EP - 1111

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

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