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Temperature Dependence of the Kondo Resonance and Its Satellites in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>CeCu</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>Si</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
We present high-resolution photoemission spectroscopy studies on the Kondo resonance of the strongly correlated Ce system ${\mathrm{CeCu}}_{2}{\mathrm{Si}}_{2}$. By exploiting the thermal broadening of the Fermi edge we analyze position, spectral weight, and temperature dependence of the low-energy $4f$ spectral features, whose major weight lies above the Fermi level ${E}_{F}$. We …