ELECTRON AND NUCLEAR MAGNETIC-RELAXATION IN LA2CUO4 AND RELATED CUPRATES

被引：129
|
作者：
CHAKRAVARTY, S
ORBACH, R
机构：
[1] Department of Physics, University of California, Los Angeles
来源：
PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 02期
关键词：
D O I：
10.1103/PhysRevLett.64.224
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The nuclear-magnetic-resonance spin-lattice relaxation time (T1) and electron-paramagnetic-resonance (EPR) linewidth ("ss) are calculated for La2CuO4. The large broadening of the EPR at room temperature is shown to narrow with increasing temperature as (3/4/a)3, where 1/4 is the two-dimensional spin-correlation length and a is the lattice constant. The NMR T1 at first lengthens with increasing temperature as (3/4/a)-1, then shortens above T1/4J/2, where J is the in-plane exchange coupling. Explicit values are calculated for T1 and "s2. AE © 1990 The American Physical Society.
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页码：224 / 227
页数：4
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