Quantum spin dynamics of an S=3/2 Heisenberg antiferromagnetic chain: inelastic pulsed neutron scattering from CsVCl3.
Quantum spin dynamics of an S=3/2 Heisenberg antiferromagnetic chain: inelastic pulsed neutron scattering from CsVCl3.
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S=3/2 海森堡反铁磁链的量子自旋动力学：CsVCl3 的非弹性脉冲中子散射。
DOI：
10.1103/physrevlett.74.2375
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发表时间：
1995
影响因子：
8.6
通讯作者：
Tanaka
中科院分区：
文献类型：
--
作者：
Itoh;Endoh;Kakurai;Tanaka
用脉冲中子从CsVC 13（S= 3/2海森堡反铁磁链）中观察到了定义明确的自旋波激发。观察到的自旋波色散关系显示激发能增加了1.26倍，这必须与S= 1/2系统的量子重整化因子π/2进行比较。40 K时的谱线宽度较宽，且与q无关。q无关线宽是第一个实验观察，这是由严格的理论预测的一个经典的链在足够低的温度。
Well-defined spin-wave excitations were observed by using pulsed neutrons from CsVC l 3, an S= 3/2 Heisenberg antiferromagnetic chain. The observed spin-wave dispersion relation shows an enhancement of the excitation energy by a factor of 1.26, which must be compared with the quantum renormalization factor of π/2 for an S= 1/2 system. The linewidth of the spectrum at 40 K was broad and independent of q. The q-independent linewidth is the first experimental observation, which was predicted by rigorous theories for a classical chain at sufficiently low temperature.