Neutron Scattering Studies on Spin-Peierls Material CuGeO3

Masaki Fujita; Katsunori Ubukata; Takahiro Bokui; Kiyoshi Tabata; Hitoshi Ohta; Mitsuhiro Motokawa

doi:10.1143/JPSJ.63.1661

Neutron Scattering Studies on Spin-Peierls Material CuGeO3

Masaki Fujita, Katsunori Ubukata, Takahiro Bokui, Kiyoshi Tabata, Hitoshi Ohta, Mitsuhiro Motokawa

Materials Property Division

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

Crystal structure and phonon dynamics up to 150 meV of the spin-Peierls material CuGeO3 have been investigated by neutron scattering experiments. We found a large lattice anomaly in the a-b plane, vertical to the one-dimensional antiferromagnetic spin chain, associated with additional diffraction peaks in the b∗-axis at temperatures much higher than the spin-Peierls transition temperature. The phonon modes of the chain oxygens at 100 meV show consistent evolution with diffraction. Therefore, we conclude that the structural evolution of the chain oxygens in the a-b plane, which mediates the spin-spin interaction along the c-axis, drives the spin-Peierls transition.

Original language	English
Pages (from-to)	1661-1665
Number of pages	5
Journal	journal of the physical society of japan
Volume	63
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.63.1661
Publication status	Published - 1994

Keywords

CuGe03
Structural anomaly
neutron scattering
phonon anomaly
spin-Peierls transition
spin-lattice interaction

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.63.1661

Cite this

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title = "Neutron Scattering Studies on Spin-Peierls Material CuGeO3",

abstract = "Crystal structure and phonon dynamics up to 150 meV of the spin-Peierls material CuGeO3 have been investigated by neutron scattering experiments. We found a large lattice anomaly in the a-b plane, vertical to the one-dimensional antiferromagnetic spin chain, associated with additional diffraction peaks in the b∗-axis at temperatures much higher than the spin-Peierls transition temperature. The phonon modes of the chain oxygens at 100 meV show consistent evolution with diffraction. Therefore, we conclude that the structural evolution of the chain oxygens in the a-b plane, which mediates the spin-spin interaction along the c-axis, drives the spin-Peierls transition.",

keywords = "CuGe03, Structural anomaly, neutron scattering, phonon anomaly, spin-Peierls transition, spin-lattice interaction",

author = "Masaki Fujita and Katsunori Ubukata and Takahiro Bokui and Kiyoshi Tabata and Hitoshi Ohta and Mitsuhiro Motokawa",

year = "1994",

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T1 - Neutron Scattering Studies on Spin-Peierls Material CuGeO3

AU - Fujita, Masaki

AU - Ubukata, Katsunori

AU - Bokui, Takahiro

AU - Tabata, Kiyoshi

AU - Ohta, Hitoshi

AU - Motokawa, Mitsuhiro

PY - 1994

Y1 - 1994

N2 - Crystal structure and phonon dynamics up to 150 meV of the spin-Peierls material CuGeO3 have been investigated by neutron scattering experiments. We found a large lattice anomaly in the a-b plane, vertical to the one-dimensional antiferromagnetic spin chain, associated with additional diffraction peaks in the b∗-axis at temperatures much higher than the spin-Peierls transition temperature. The phonon modes of the chain oxygens at 100 meV show consistent evolution with diffraction. Therefore, we conclude that the structural evolution of the chain oxygens in the a-b plane, which mediates the spin-spin interaction along the c-axis, drives the spin-Peierls transition.

AB - Crystal structure and phonon dynamics up to 150 meV of the spin-Peierls material CuGeO3 have been investigated by neutron scattering experiments. We found a large lattice anomaly in the a-b plane, vertical to the one-dimensional antiferromagnetic spin chain, associated with additional diffraction peaks in the b∗-axis at temperatures much higher than the spin-Peierls transition temperature. The phonon modes of the chain oxygens at 100 meV show consistent evolution with diffraction. Therefore, we conclude that the structural evolution of the chain oxygens in the a-b plane, which mediates the spin-spin interaction along the c-axis, drives the spin-Peierls transition.

KW - CuGe03

KW - Structural anomaly

KW - neutron scattering

KW - phonon anomaly

KW - spin-Peierls transition

KW - spin-lattice interaction

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Neutron Scattering Studies on Spin-Peierls Material CuGeO3

Abstract

Keywords

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