TY - JOUR
T1 - Raman spectroscopy of single crystals of high- Tc, cuprates
AU - Krol, D. M.
AU - Stavola, Michael
AU - Schneemeyer, L. F.
AU - Waszczak, J. V.
AU - Sunshine, S. A.
PY - 1989/3
Y1 - 1989/3
N2 - We present normal mode assignments for the Raman spectra of 1-2-3-type materials on the basis of polarized Raman studies of single crystals of Ba2YCu3O7, Ba2YCu3O6, Sr2YCu2.4A10.607, and Ba2_xLaj+xCu3O7+δ. In Ba2YCu3O7 we observe five intrinsic modes at 500 [0(1) axial stretch], 435 [in-phase 0(2), 0(3) bend], 335 [out-of-phase 0(2), 0(3) bend], 140 [Cu(2) axial stretch mode], and 118 cm− 1(Ba axial mode). Defect-induced modes are found at 600 and 220 − 1. A mode at 640 − 1, which is seen only in ceramics, is shown to be due to a BaCuO2 impurity phase. Furthermore, we discuss the Raman spectra of Bi2Sr2Can − 1CunO4+2n, and the high-frequency (ω > 1000 − 1) scattering in Ba2YCu3O6 and Ba2YCu3O7.
AB - We present normal mode assignments for the Raman spectra of 1-2-3-type materials on the basis of polarized Raman studies of single crystals of Ba2YCu3O7, Ba2YCu3O6, Sr2YCu2.4A10.607, and Ba2_xLaj+xCu3O7+δ. In Ba2YCu3O7 we observe five intrinsic modes at 500 [0(1) axial stretch], 435 [in-phase 0(2), 0(3) bend], 335 [out-of-phase 0(2), 0(3) bend], 140 [Cu(2) axial stretch mode], and 118 cm− 1(Ba axial mode). Defect-induced modes are found at 600 and 220 − 1. A mode at 640 − 1, which is seen only in ceramics, is shown to be due to a BaCuO2 impurity phase. Furthermore, we discuss the Raman spectra of Bi2Sr2Can − 1CunO4+2n, and the high-frequency (ω > 1000 − 1) scattering in Ba2YCu3O6 and Ba2YCu3O7.
UR - http://www.scopus.com/inward/record.url?scp=84975562864&partnerID=8YFLogxK
U2 - 10.1364/JOSAB.6.000448
DO - 10.1364/JOSAB.6.000448
M3 - Article
AN - SCOPUS:84975562864
SN - 0740-3224
VL - 6
SP - 448
EP - 454
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
IS - 3
ER -