DSpace at EWHA: Raman study of the Hg0.7Cr0.3Sr2CuO4+δ superconductors

View : 584 Download: 0

Raman study of the Hg0.7Cr0.3Sr2CuO4+δ superconductors

Authors: Lee S.-Y.; Chang B.-Y.; Yang I.-S.; Gwak J.-H.; Kim S.-J.; Choi J.-H.; Lee S.-I.; Yakhmi J.V.; Mandal J.B.; Bandyopadhyay B.; Ghosh B.

Citation: Physica C: Superconductivity and its Applications vol. 282-287, no. PART 2, pp. 1039 - 1040

Abstract: The local environment of the apical oxygens (OA) in the Sr-substituted mercury-based superconductor Hg0.7Cr0.3Sr2CuCuO4+δ is investigated using Raman spectroscopy. Raman spectra from the Sr-substituted Hg-1201 samples show broad OA A1g double peaks at 553 and 583 cm-1, which are 10 -20 cm-1 lower than the pristine Hg-1201. The existence of, and lower shift of, the double peaks in the Raman spectra of the Sr-substituted Hg-1201 superconductors indicate changes in the environment of OA in the Sr-substituted mercury-based superconductors.