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Sökning: WFRF:(Boseggia S.)

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1.
  • Rossi, Matteo, et al. (författare)
  • Resonant inelastic X-ray scattering of magnetic excitations under pressure
  • 2019
  • Ingår i: Journal of Synchrotron Radiation. - 0909-0495. ; 26, s. 1725-1732
  • Tidskriftsartikel (refereegranskat)abstract
    • Resonant inelastic X-ray scattering (RIXS) is an extremely valuable tool for the study of elementary, including magnetic, excitations in matter. The latest developments of this technique have mostly been aimed at improving the energy resolution and performing polarization analysis of the scattered radiation, with a great impact on the interpretation and applicability of RIXS. Instead, this article focuses on the sample environment and presents a setup for high-pressure low-temperature RIXS measurements of low-energy excitations. The feasibility of these experiments is proved by probing the magnetic excitations of the bilayer iridate Sr 3 Ir 2 O 7 at pressures up to 12 GPa.
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2.
  • Wojek, Bastian M., et al. (författare)
  • The J(eff)=1/2 insulator Sr3Ir2O7 studied by means of angle-resolved photoemission spectroscopy
  • 2012
  • Ingår i: Journal of Physics. - : IOP Publishing. - 0953-8984 .- 1361-648X. ; 24:41, s. 415602-
  • Tidskriftsartikel (refereegranskat)abstract
    • The low-energy electronic structure of the J(eff) = 1/2 spin-orbit insulator Sr3Ir2O7 has been studied by means of angle-resolved photoemission spectroscopy. A comparison of the results for bilayer Sr3Ir2O7 with available literature data for the related single-layer compound Sr2IrO4 reveals qualitative similarities and similar J(eff) = 1/2 bandwidths for the two materials, but also pronounced differences in the distribution of the spectral weight. In particular, photoemission from the J(eff) = 1/2 states appears to be suppressed. Yet, it is found that the Sr3Ir2O7 data are in overall better agreement with band-structure calculations than the data for Sr2IrO4.
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