2010 Physical Review Publications Stability of exfoliated $Bi_2Sr_2Dy_xCa_1-xCu_2O_8+δ$ studied by Raman microscopy August 3, 2010May 5, 2014 Kenneth Burch L. J. Sandilands, J. X. Shen, G. M. Chugunov, S. Y. F. Zhao, Shimpei Ono, Yoichi Ando, K. S. Burch. Stability of exfoliated $Bi_2Sr_2Dy_xCa_1-xCu_2O_8+δ$ studied by Raman microscopy Phys. Rev. B 82, 064503 (2010)