Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-11-25
Phys. Rev. B 85, 064423 (2012)
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 4 figures; v2: references added, published version
Scientific paper
10.1103/PhysRevB.85.064423
We examine the momentum-dependent excitation spectra of indirect as well as direct resonant inelastic x-ray scattering (RIXS) processes in half-filled (extended) Hubbard rings. We determine the fundamental features of the groundstate RIXS response and discuss the experimental conditions that can allow for the low-energy part of these features to be distinguished in one-dimensional copper-oxide materials, focusing particularly on the different magnetic excitations occurring in indirect and direct RIXS processes. We study the dependence of spin and charge excitations on the choice of and detuning from resonance. Moreover, final state excitation weights are calculated as a function of the core-hole potential strength and lifetime. We show that these results can be used to determine material characteristics, such as the core-hole properties, from RIXS measurements.
Daghofer Maria
Kourtis Stefanos
van den Brink Jeroen
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