Toward a unified magnetic phase diagram of the cuprate superconductors.
Toward a unified magnetic phase diagram of the cuprate superconductors.
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DOI：
10.1103/physrevlett.71.2813
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发表时间：
1993-06
影响因子：
8.6
通讯作者：
Alexander Sokol;Alexander Sokol;D. Pines;D. Pines
中科院分区：
文献类型：
--
作者：
Alexander Sokol;Alexander Sokol;D. Pines;D. Pines
我们提出了铜酸盐超导体的统一磁相图。该相图的一个新特征是具有量子临界 z=1 行为的广泛中间掺杂区域，其特征是与温度无关的 ${\mathit{T}}_{1}$T/${\mathit{T}}_{2\mathit{G}}$ 和线性 ${\mathit{T}}_{1}$T，其中高能自旋波不会过阻尼。中等掺杂材料中的自旋间隙与在量子无序 z=1 状态下对小于 ${\mathrm{\ensuremath{\Delta}}}_{\ensuremath{\xi}}$=c/\ensuremath{\xi} 的频率的光谱权重的抑制有关。到 z=2 状态的交叉，其中 ${\mathit{T}}_{1}$T/${\mathit{T}}_{2\mathit{G}}^{2}$\ensuremath{\simeq}const 仅发生在完全掺杂的材料中。
We propose a unified magnetic phase diagram of the cuprate superconductors. A new feature of this phase diagram is a broad intermediate doping region of quantum-critical, z=1, behavior, characterized by temperature independent ${\mathit{T}}_{1}$T/${\mathit{T}}_{2\mathit{G}}$ and linear ${\mathit{T}}_{1}$T, where the high energy spin waves are not overdamped. The spin gap in the moderately doped materials is related to the suppression of the spectral weight for frequencies smaller than ${\mathrm{\ensuremath{\Delta}}}_{\ensuremath{\xi}}$=c/\ensuremath{\xi} in the quantum disordered, z=1, regime. The crossover to the z=2 regime, where ${\mathit{T}}_{1}$T/${\mathit{T}}_{2\mathit{G}}^{2}$\ensuremath{\simeq}const, occurs only in the fully doped materials.