Science Advances

This PDF file includes:

• Section S1. Global fit analysis
• Section S2. Generation mechanism
• Section S3. Phenomenological description of the observed exciton renormalization
• Section S4. Perturbative model for coherent acoustic phonons
• Section S5. Additional many-body perturbation theory calculations
• Fig. S1. Traditional approach of ultrafast acoustics applied to anatase TiO₂.
• Fig. S2. Simulation of the transient acoustic signal.
• Fig. S3. Many-body perturbation theory calculations on the strained unit cell.
• Fig. S4. Calculation of the photoelastic coefficients.
• Fig. S5. Comparison between the RPA-GW and BSE-GW results.
• References (46, 47)

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