Critical Behavior of the S=3/2 Antiferromagnetic Heisenberg Chain.

Critical Behavior of the S=3/2 Antiferromagnetic Heisenberg Chain.
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S=3/2 反铁磁海森堡链的临界行为。

DOI:
10.1103/physrevlett.76.4955
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发表时间:
1996
影响因子:
8.6
通讯作者:
A. Moreo
A. Moreo
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Karen Hallberg;Xiaoqun Wang;Peter Horsch;A. Moreo

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利用密度矩阵重整化群方法,研究了自旋S=3/2近邻海森堡链的长波性质。我们得到了自旋速度v=3.8+-0.02的精确值,与实验结果一致。结果表明,该模型与S=1/2海森堡链属于同一普适类,共形中心电荷c=1,临界指数eta=1
Using the density-matrix renormalization-group technique we study the long-wavelength properties of the spin S=3/2 nearest-neighbor Heisenberg chain. We obtain an accurate value for the spin velocity v=3.8+- 0.02, in agreement with experiment. Our results show conclusively that the model belongs to the same universality class as the S=1/2 Heisenberg chain, with a conformal central charge c=1 and critical exponent eta=1