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High-Resolution Photoemission on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>RuO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies
Experiments reveal that quasiparticle properties in the superconductor Sr${}_{2}$RuO${}_{4}$ have a significant angular dependence due to the combined effects of local electron interactions and spin-orbit coupling.