论文标题
受磁场的抗铁磁膜中的自旋顺序和熵
Spin Order and Entropy in Antiferromagnetic Films Subjected to Magnetic Fields
论文作者
论文摘要
使用系统的有效场理论，我们探讨了抗铁磁性膜的性质，受到磁性和交错磁场的影响，这些薄膜是相互对准或相互正交的。在两种情况下，我们为熵密度提供低温序列。我们调用了两分抗抗铁磁铁的交错，均匀和转带磁化，我们研究了由温度，磁性和交错场引起的自旋排列中微妙的订单diSorder现象，其中一些非常反直觉。在数字中，我们专注于自旋 - $ \ frac {1} {2} $ square-lattice Antifermagnet，但我们的结果对于任何其他两分二维晶格都是有效的。
Using systematic effective field theory, we explore the properties of antiferromagnetic films subjected to magnetic and staggered fields that are either mutually aligned or mutually orthogonal. We provide low-temperature series for the entropy density in either case up to two-loop order. Invoking staggered, uniform and sublattice magnetizations of the bipartite antiferromagnet, we investigate the subtle order-disorder phenomena in the spin arrangement, induced by temperature, magnetic and staggered fields -- some of which are quite counterintuitive. In the figures we focus on the spin-$\frac{1}{2}$ square-lattice antiferromagnet, but our results are valid for any other bipartite two-dimensional lattice.
