Vacancies and adatoms unlock reactivity in 2H-TiBr2 monolayersRemoveAndré L. de O. Batista, João Marcos T. Palheta, Emanuel J. A. Santos, Carlos Maciel O. Bastos, Luiz A. Ribeiro Júnior, Diego Guedes-Sobrinho, Celso R. C. Rêgo, Maurício J. Piotrowski, and Alexandre C. DiasPhys. Rev. Materials 10, 034004 (2026)