Direct relation between the low-energy spin excitations and superconductivity of overdoped high-$T_c$ superconductors

S. Wakimoto, H. Zhang, K. Yamada +3

The dynamic spin susceptibility, ${\chi }^{\prime \prime }(\omega )$, has been measured over the energy range of $2\le \omega \le 10$ meV for overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$. Incommensurate (IC) spin exci…