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Anisotropic Spin Excitations in Spin-Peierls CuGeO3
Kazuhiko Ikeuchi,Ryoichi Kajimoto,Fumio Mizuno,Masaki Fujita,Yasuhiro Inamura,Mitsutaka Nakamura,Kenji Nakajima,Kazuya Aizawa,Masatoshi Arai 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
We report on the investigation of spin excitations in CuGeO3 at a low temperature by usinginelastic neutron scattering on a pulsed source with a time-of-flight analysis. By observing thedispersion relation of spin excitations not only along the chain direction but also along the interchain direction, we studied spin correlations in the S = 1/2 Heisenberg chains, as well as between thechains, in detail. The results show a clear anisotropy of the magnetic excitations at a temperaturebelow the spin-Peierls transition temperature.