Multiple-Spin Exchange on a Triangular Lattice: A Quantitative Interpretation of Thermodynamic Properties of Two-Dimensional Solid 3 He
Multiple-Spin Exchange on a Triangular Lattice: A Quantitative Interpretation of Thermodynamic Properties of Two-Dimensional Solid 3 He
复制标题
三角形晶格上的多自旋交换：二维固体 3 He 热力学性质的定量解释
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
H. Godfrin
中科院分区：
文献类型：
--
作者：
M. Roger;C. Bäuerle;Y. Bunkov;A. S. Chen;H. Godfrin
我们适用于精确的高温系列展开的多自旋交换哈密顿量的三角形晶格描述高精度的核磁共振测量的3 He膜吸附在石墨上，在这里报道，以及所有可用的比热数据。第二层固体的不寻常的热力学性质的一致的定量描述，提供了典型的例子，二维磁体，作为温度和面密度的函数。我们证明，循环的多自旋交换过程是反铁磁相中发现的很大程度的挫败的原因，并且它们在铁磁相中仍然很重要。[S0031-9007（97）05249-6]
We apply exact high-temperature series expansions of the multiple-spin-exchange Hamiltonian for a triangular lattice to describe high precision NMR measurements of the nuclear magnetic susceptibility of 3He films adsorbed on graphite, reported here, as well as all available specific heat data. A consistent quantitative description of the unusual thermodynamic properties of the second layer solid, which provides canonical examples of two-dimensional magnets, is obtained as a function of temperature and areal density. We prove that cyclic multiple-spin exchange processes are responsible for the large degree of frustration found in the antiferromagnetic phase and that they remain significant in the ferromagnetic phase. [S0031-9007(97)05249-6]