Fig. 5: Self-energy and Eliashberg function of SrTiO3. | npj Computational Materials

Fig. 5: Self-energy and Eliashberg function of SrTiO3.

From: Extraction of the self energy and Eliashberg function from angle resolved photoemission spectroscopy using the xARPES code

Fig. 5: Self-energy and Eliashberg function of SrTiO3.The alternative text for this image may have been generated using AI.

a Band map of the 2DEL on the TiO2-terminated surface of SrTiO3 along k[110], showing MDC maxima with 95% confidence intervals for the outer left (green), inner left (red), inner right (blue), and outer right (purple) branches, with inner/outer bands (black) from initial guesses and the optimized inner left/right branches (dashed red/blue). b Comparison of the inner left α2FIL(ω) (red) with the inner right α2FIR(ω) (blue) with the optimized model function mIR(ω) (dash-dotted gold), based on the inner right real \({\widetilde{\Sigma}}_{{\rm{I}}{\rm{R}}}^{{{{\prime}}}}(E)\) (green bars) and minus imaginary data \(-{\widetilde{\Sigma}}_{{\rm{I}}{\rm{R}}}^{\prime\prime}(E)\) (indigo bars), with reconstructions \({\Sigma }_{{\rm{IR}}}^{{\prime} }(E)\) (blue) and \(-{\Sigma }_{{\rm{IR}}}^{{\prime\prime} }(E)\) (indigo). c Self-energies of the outer right branch obtained with and without (NM) photoemission matrix elements, comprising the corrected real \({\Sigma }_{{\rm{OR}}}^{{\prime} }(E)\) (light blue) and imaginary parts \(-{\Sigma }_{{\rm{OR}}}^{{\prime\prime} }(E)\) (gold), and the real \({\Sigma }_{{\rm{OR}}}^{{{\rm{NM}}}^{{\prime} }}(E)\) (pink) and imaginary parts \(-{\Sigma }_{{\rm{OR}}}^{{{\rm{NM}}}^{{\prime\prime} }}(E)\) (teal) without the correction. Corresponding data are denoted using a tilde.

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