title: Revisiting La0.5Sr1.5MnO4lattice distortion and charge ordering with multi-beam resonant diffraction.
abstract: Sinusoidal wave type distortions of La0.5Sr1.5MnO4in the low-temperature orthorhombic phase were observed using multi-beam resonant X-ray diffraction (MRXD) with (7/4 7/4 0) fractional primary diffraction. Two four-beam diffractions with opposite asymmetry were measured at 6.5545 keV and compared with the curves simulated by the dynamical X-ray diffraction theory. This approach provides the possibility of resolving the distortion modes which are perpendicular to the momentum transfer by a single azimuthal scan. The paper also demonstrates the sensitivity of MRXD profiles versus incident X-ray energy in the vicinity of the Mn K edge to the charge disproportion between the two manganese sites, reconfirming the small charge disproportion feature.
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Wen Chung
authors.initials: WC
authors.lastname: Liu
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Yi Hua
authors.initials: YH
authors.lastname: Chiu
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Ying Yu
authors.initials: YY
authors.lastname: Kung
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Po Yu
authors.initials: PY
authors.lastname: Liao
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Chih Hao
authors.initials: CH
authors.lastname: Cheng
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Yu Chieh
authors.initials: YC
authors.lastname: Chih
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Yi Wei
authors.initials: YW
authors.lastname: Tsai
authors.affiliation: National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan.
authors.forename: Chia Hung
authors.initials: CH
authors.lastname: Chu
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Chia Hung
authors.initials: CH
authors.lastname: Lai
authors.affiliation: National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan.
authors.forename: Di Jing
authors.initials: DJ
authors.lastname: Huang
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Yun Liang
authors.initials: YL
authors.lastname: Soo
authors.affiliation: Department of Physics, Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Shih Lin
authors.initials: SL
authors.lastname: Chang
keywords: La0.5Sr1.5MnO4; X-ray multiple diffraction; dynamical X-ray diffraction theory