Analysis of Resonant Inelastic X-ray Scattering in Stripe-Ordered Nickelate

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概要

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• We analyze theoretically the resonant inelastic x-ray scattering (RIXS) at the Ni K edge in the stripe-ordered state of La2-xSrxNiO4 at x=1/3. In the calculation of RIXS spectra, the stripe-ordered ground state is described within the Hartree--Fock approximation by using a realistic tight-binding model for Ni 3d\gamma and O 2p_{x,y} orbitals, and the electron correlations in the electronic excitation processes are taken into account within the random-phase approximation. The calculated RIXS spectrum shows a tail toward the low-energy region when the momentum transfer of photons equals the stripe vector \mbi{Q}, being consistent with a recent experimental result. The origin of this anomalous momentum dependence of RIXS spectra is discussed microscopically.

• 2012-02-15

著者

• Kaneshita Eiji

  Sendai National College of Technology, Sendai 989-3128, Japan

• Nomura Takuji

  Quantum Beam Science Directorate, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan

関連論文

• Significance of off-center rattling for emerging low-lying THz modes in type-1 clathrates
• Origin of In-Plane Anisotropy in Optical Conductivity for Antiferromagnetic Metallic Phase of Iron Pnictides
• Analysis of Resonant Inelastic X-ray Scattering in Stripe-Ordered Nickelate

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