Ab initio modeling and experimental analysis of contrast in broadband coherent anti-Stokes Raman spectroscopy: A case study on ferroelectric domain wallsRemoveRobin Buschbeck, Mike N. Pionteck, Naomi Herrmann, Michael Rüsing, Susanne C. Kehr, Simone Sanna, and Lukas M. EngPhys. Rev. B 114, 034104 (2026)