Scaling Behavior of the Generalized Susceptibility in La2−xSrxCuO4+y

作者：B. Keimer, R. J. Birgeneau, Arlete Cassanho, Y. Endoh, R. W. Erwin, M. A. Kastner, Gen Shirane · 发表于：Physical Review Letters · 年份：1991 · DOI：10.1103/physrevlett.67.1930 · 被引用次数：155 · 研究领域：Physics of Superconductivity and Magnetism、Advanced Condensed Matter Physics、Magnetic and transport properties of perovskites and related materials

We have measured the static and dynamic spin fluctuations in a crystal of ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Cu}{\mathrm{O}}_{4+y}$ in the spin-glass doping regime. The static spin correlations are well described by a simple model in which the inverse correlation length $\ensuremath{\kappa}(x, T)=\ensuremath{\kappa}(x, 0)+\ensuremath{\kappa}(0, T)$. The dynamic spin fluctuations exhibit a simple scaling behavior in $\frac{\ensuremath{\omega}}{T}$ for temperatures $10 \mathrm{K}\ensuremath{\le}T\ensuremath{\le}500 \mathrm{K}$ for the measured energies $4.5\ensuremath{\le}\ensuremath{\omega}\ensuremath{\le}12$ meV.