Inelastic neutron scattering study of phonon anomalies in La1.5Sr0.5NiO4

1st Conference on Light and Particle Beams in Materials Science 2013

物理学;材料科学

Kajimoto, R.^1 ; Fujita, M.^2 ; Nakajima, K.^1 ; Ikeuchi, K.^3 ; Inamura, Y.^1 ; Nakamura, M.^1 ; Imasato, T.^4

J-PARC Center, Japan Atomic Energy Agency, Ibaraki 319-1195 Tokyo, Japan^1

Institute for Materials Research, Tohoku University, Miyagi 980-8577, Sendai, Japan^2

Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society, Ibaraki 319-1106, Tokyo, Japan^3

Department of Physics, Tohoku University, Miyagi 980-8578, Sendai, Japan^4

关键词: Charge ordering;    High energy phonons;    Longitudinal modes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/502/1/012056/pdf
DOI  :  10.1088/1742-6596/502/1/012056

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The high-energy phonons in La1.5Sr0.5NiO4, in which the checkerboard charge ordering is formed, was investigated by the inelastic neutron scattering. We found that the longitudinal modes show strong anomalies compared with La2NiO4. We argue the similarity and difference in the phonon anomalies between the present sample and the preceding works of different compositions.