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脇本 秀一; 池内 和彦*; 新井 正敏; 藤田 全基*; 梶本 亮一; 川村 奨*; 松浦 直人*; 中島 健次; 山田 和芳*
JPS Conference Proceedings (Internet), 8, p.034013_1 - 034013_6, 2015/09
Previous neutron results of LaSr
CuO
(LSCO) by TOF measurements revealed that magnetic dynamical structure factor has a maximum at
18 meV. To clarify the origin of the maximum, we carried out 4 dimensional mapping of dynamical structure factor
to see details of both magnons and phonons. We found that
= 0 shows ordinary spin waves while
= 0.08 shows a maximum at
18 meV where
-independent phonon branch crosses. This imply that in superconducting compositions phonon may also indirectly related to the superconductivity.