Anisotropic charge transfer mechanism in La${}_{2-x}$Sr${}_x$CuO${}_4$ and Bi${}_2$Sr${}_2$Ca${}_{1-x}$Y${}_x$Cu${}_2$O${}_{8+\delta }$

S. Sugai, N. Hayamizu, T. Hosokawa

Raman spectra of La${}_{2-x}$Sr${}_x$CuO${}_4$ are similar to those of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ except for the split two-magnon peaks at the stripe phase and the stronger step-like…