Apparent color and Raman vibrational modes of the unconventional superconductor Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ exfoliated flakes

Ignacio Figueruelo-Campanero, Adolfo del Campo, Gladys Nieva +3

Studying and controlling the properties of individual exfoliated materials is one of the first steps towards the fabrication of complex van der Waals systems. However, prolonged ex…