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 - 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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@article{ac2e324d2b104279b1f03f57ce11ec20,

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.",

author = "M. Nishi and K. Kakurai and Y. Fujii and S. Katano and J. Akimitsu and M. Yethiraj and Fernandez-Baca, {J. A.}",

note = "Funding Information: We acknowledge the expert technical assistance provided by Scott Moore, Brent Taylor, S. Watanabe, T. Shibuya, Y. Kawamura, and Y. Shimojo, and the sample preparation assistance provided by T. Kitazawa and Y. Zenitani. A part of this work was done at ORNL under US–Japan Cooperation Program in Neutron Scattering. ORNL is managed for the US DOE by Lockheed Martin Energy Research Corporation under contract DE-AC05-96OR22464. This work was partly supported by a Grant from CREST and the Science Fund of Japan Private School Promotion Foundation. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.; Proceedings of the 1998 7th ISSP International Symposium Frontiers in Neutron Scattering Research (ISSP7) ; Conference date: 24-11-1998 Through 27-11-1998",

year = "1999",

doi = "10.1016/S0022-3697(99)00062-1",

language = "English",

volume = "60",

pages = "1109--1111",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier Limited",

number = "8",

}

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.

N1 - Funding Information: We acknowledge the expert technical assistance provided by Scott Moore, Brent Taylor, S. Watanabe, T. Shibuya, Y. Kawamura, and Y. Shimojo, and the sample preparation assistance provided by T. Kitazawa and Y. Zenitani. A part of this work was done at ORNL under US–Japan Cooperation Program in Neutron Scattering. ORNL is managed for the US DOE by Lockheed Martin Energy Research Corporation under contract DE-AC05-96OR22464. This work was partly supported by a Grant from CREST and the Science Fund of Japan Private School Promotion Foundation. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 1999

Y1 - 1999

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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DO - 10.1016/S0022-3697(99)00062-1

M3 - Conference article

AN - SCOPUS:0032590613

VL - 60

SP - 1109

EP - 1111

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

IS - 8

T2 - Proceedings of the 1998 7th ISSP International Symposium Frontiers in Neutron Scattering Research (ISSP7)

Y2 - 24 November 1998 through 27 November 1998