Scaling Relation of Electron Spin-Spin Correlation in High-Temperature Superconductors
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概要
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Temperature (T) dependence of the static and the dynamic electron spin-spin correlation is discussed through the planar ^<63>Cu (2) nuclear spin-spin relaxation rate 1/^<63>T_G and the spin-lattice relaxation rate 1/^<63>T_1T for YBa_2Cu_3O_<6.6>(T_c〜60K), YBa_2Cu_4O_8(T_c〜82K), YBa_2Cu_3O_<6.98>(T_c〜92K), and Tl_2Ba_2CuO_<6+δ>(T_c〜85K). The restricted moment sums S=(^<63>T_1T)_<AF>/(^<63>T_G)^2 [〜X(Q)Γ(Q)] for the lightly doped Cu oxides tend to have constant values at high temperatures and those for the other ones are nearly T-independent at all the measured T (T_c < T< 300 K). The T-independent S indicates the validity of (1/^<63>T_1)_<AF>∝TX(Q) for the antiferromagnetic Fermi liquid model. From the experimental values of S, we estimate the ratio 2α_sT_A/T_0 of the characteristic spin-fluctuation parameters 2α_sT_A and T_0.
- 社団法人日本物理学会の論文
- 1994-07-15
著者
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Yasuoka Hiroshi
Institute For Chemistry Research Kyoto University
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Itoh Yutaka
Institute For Solid State Physics The University Of Tokyo
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Itoh Yutaka
Institute For Solid State Physics University Of Tokyo
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Yasuoka Hiroshi
Institute Fo Solid State Physics University Of Tokyo
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