%0 Journal Article
%T Switching of intra-orbital spin excitations in electron-doped iron pnictide superconductors
%A Soshi Iimura
%A Satoru Matsuishi
%A Masashi Miyakawa
%A Takashi Taniguchi
%A Katsuhiro Suzuki
%A Hidetomo Usui
%A Kazuhiko Kuroki
%A Ryoichi Kajimoto
%A Mitsutaka Nakamura
%A Yasuhiro Inamura
%A Kazuhiko Ikeuchi
%A Sungdae Ji
%A Hideo Hosono
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevB.88.060501
%X We investigate the doping dependence of the magnetic excitations in two-superconducting-dome-system LaFeAsO1-xDx. Using inelastic neutron scattering, spin fluctuations at different wavenumbers were observed under both superconducting domes around x = 0.1 and 0.4, but vanished at x = 0.2 corresponding to the Tc valley. Theoretical calculations indicate that the characteristic doping dependence of spin fluctuations is rationally explained as a consequence of the switching of the two intra-orbital nestings within Fe-3dYZ, ZX and 3dX2-Y2 by electron doping. The present results imply that the multi-orbital nature plays an important role in the doping and / or material dependence of the Tc of the iron pnictide superconductors.
%U http://arxiv.org/abs/1307.7016v2