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.

引用

页码：224 / 227

页数：4

共 25 条

[21] THERMODYNAMIC PARAMETERS OF THE T = 0, SPIN-1/2 SQUARE-LATTICE HEISENBERG-ANTIFERROMAGNET [J].