Resonant inelastic x-ray scattering as a probe of the phase and excitations of the order parameter of superconductors

The capability to probe the dispersion of elementary spin, charge, orbital, and lattice excitations has positioned resonant inelastic x-ray scattering (RIXS) at the forefront of photon science. Here we develop the scattering theory for RIXS on superconductors, calculating its momentum-dependent scat...

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Published in:Physical review letters 2013-03, Vol.110 (11), p.117005-117005, Article 117005
Main Authors: Marra, Pasquale, Sykora, Steffen, Wohlfeld, Krzysztof, van den Brink, Jeroen
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Language:English
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container_end_page 117005
container_issue 11
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container_title Physical review letters
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creator Marra, Pasquale
Sykora, Steffen
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description The capability to probe the dispersion of elementary spin, charge, orbital, and lattice excitations has positioned resonant inelastic x-ray scattering (RIXS) at the forefront of photon science. Here we develop the scattering theory for RIXS on superconductors, calculating its momentum-dependent scattering amplitude. Considering superconductors with different pairing symmetries, we show that the low-energy scattering is strongly affected by the superconducting gap and coherence factors. This establishes RIXS as a tool to disentangle pairing symmetries and to probe the elementary excitations of unconventional superconductors.
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title Resonant inelastic x-ray scattering as a probe of the phase and excitations of the order parameter of superconductors
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