Low-temperature properties of two-dimensional frustrated quantum antiferromagnets.
Low-temperature properties of two-dimensional frustrated quantum antiferromagnets.
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二维受挫量子反铁磁体的低温特性。
DOI：
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发表时间：
1992
影响因子：
8.6
通讯作者：
Mouhanna
中科院分区：
文献类型：
--
作者：
Azaria;Delamotte;Mouhanna
在Chakravarty，Halperin和Nelson之后，我们研究了适用于这些系统的量子非线性Sigma模型，得到了关联长度ξ=Cξ[A/(K B T)1/2]e 2πB/kBt，其中A和B依赖于由量子涨落重整化的自旋刚度和自旋波速度
Though much of the recent work on 2D quantum canted antiferromagnets has been devoted to the study of disordered states, there is evidence that some of these systems have Neel ground states, even for spin 1/2. Following Chakravarty, Halperin, and Nelson, we study the quantum nonlinear sigma model suited to these systems and obtain for the correlation length ξ=C ξ [A/(k B T) 1/2 ] e 2πB/kBT , where A and B depend on the spin stiffnesses and spin-wave velocities renormalized by quantum fluctuations