Se p 19 99 Calculation of Neel temperature for S = 1 / 2 Heisenberg quasi - one - dimensional antiferromagnets
نویسندگان
چکیده
Isotropic S = 1/2 quasi-one-dimensional antiferromagnets are considered within the bosonization method. The 1/z ⊥-corrections to the interchain mean-field theory (where z ⊥ is the number of nearest neighbors in transverse to chain directions) are obtained for the ground-state sublattice magnetization S 0 and Neel temperature T N. The corrections to T N make up about 25% of mean-field value, while those to S 0 are small enough (especially in the three-dimensional case). The fluctuation corrections obtained improve considerably the agreement with the experimental data for magnetic-chain compounds KCuF 3 , Sr 2 CuO 3 and Ca 2 CuO 3 .
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