X-ray diffuse scattering study of local distortions in Fe1+xTe induced by excess Fe

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Title:	X-ray diffuse scattering study of local distortions in Fe1+xTe induced by excess Fe
Authors:	Liu, X.;Lee, C.-C.;Xu, Z. J.;Wen, J. S.;Gu, G.;Ku, W.;Tranquada, J. M.;Hill, J. P.
Date:	2011-05-31
Issue Date:	2019-10-15 12:11:19 (UTC+8)
Abstract:	We report x-ray diffuse scattering studies of the iron chalcogenide Fe 1 + x Te as a function of doping and temperature for x = 0 . 03 , 0.08, and 0.12. In all cases, remarkably strong, characteristic diffuse scattering is observed. This scattering extends throughout the Brillouin zone and exhibits a nonmonotonic decay away from the fundamental Bragg peaks, with a peaklike structure at a reduced q ≈ ( 0 . 3 , 0 , 0 . 6 ) . We interpret this scattering as Huang diffuse scattering resulting from distortions induced by the interaction between the excess Fe and the FeTe layers. The form of the scattering indicates that this interaction is strong and extends a number of unit cells away from the interstitial Fe site. Further, the diffuse scattering shows a sudden decrease on cooling through the structural and magnetic phase transition, reflecting the first-order change of the electronic structure of FeTe.
Relation:	Phys. Rev. B 83, 184523
DOI:	10.1103/PhysRevB.83.184523
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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