SpectraFormer: an Attention-Based Raman Unmixing Tool for Accessing the Graphene Buffer-Layer Signature on SiC. - Dmitriy Poteryayev; Pietro Novelli; Annalisa Coriolano; Riccardo Dettori; Valentina Tozzini; Fabio Beltram; Massimiliano Pontil; Antonio Rossi; Stiven Forti; Camilla Coletti (CoRR, 2026)