Difference between the cleaved surface and the polished surface on the Raman spectra of La$_{2-x}$Sr$_x$CuO$_4$

S. Sugai; Y. Takayanagi; N. Hayamizu

paper

Difference between the cleaved surface and the polished surface on the Raman spectra of La $_{2 - x}$ Sr $_{x}$ CuO $_{4}$

arXiv:cond-mat/0010174

Abstract

The Raman spectra on the cleaved surface of La $_{2 - x}$ Sr $_{x}$ CuO $_{4}$ is found to be different from those on the mechanically polished or chemically etched surface. On the cleaved surface, the step-like increase of the scattering intensity below 700 cm $^{- 1}$ is washed away and the two-phonon peaks are preserved clearly even at the optimum doping. The difference is demonstrated on the optimally doped crystal at x=0.15 and the stripe phase crystal at x=0.115. The stripe phase is stabilized by defects induced by mechanical polishing.

9 pages, 4 figures

Difference between the cleaved surface and the polished surface on the Raman spectra of La2−x​Srx​CuO4​

Abstract

Difference between the cleaved surface and the polished surface on the Raman spectra of La $_{2 - x}$ Sr $_{x}$ CuO $_{4}$