EVIDENCE FOR TEMPERATURE-DEPENDENT ANTIFERROMAGNETIC CORRELATION LENGTH IN HIGH-T-C CU OXIDES

被引:10
|
作者
ITOH, Y [1 ]
HAYASHI, A [1 ]
UEDA, Y [1 ]
机构
[1] UNIV TOKYO, INST SOLID STATE PHYS, TOKYO 106, JAPAN
关键词
ELECTRON CORRELATION; ANTIFERROMAGNETIC CORRELATION LENGTH; HIGH T; SUPERCONDUCTOR; NMR; EXPERIMENT;
D O I
10.1143/JPSJ.64.3072
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report the temperature(T)-dependent anisotropy r(= W-63(ab)/(63) W-cc) Of the planar Cu-63 nuclear spin-lattice relaxation rates W-63(a) (alpha=ab, cc) in the high-T-c Cu oxides, YBa2Cu4O8, YBa2Cu3O6.96 and Tl2Ba2CuO6+delta, from around T-c up to about 300 K. We discuss within the spin-fluctuation model that the anisotropy r is dependent only on the antiferromagnetic correlation length xi and that its T-dependence for the lightly-doped material is different from that of the over-doped ones. We provide the T-dependent anisotropy r as direct evidence of the T-dependent xi.
引用
收藏
页码:3072 / 3081
页数:10
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