摘要翻译:
许多经典的,几何受挫的反铁磁体具有宏观简并的基态。在一类三维系统中,简并基态集具有幂律关联,是库仑相的一个例子。我们从这样一个库仑相中研究了Neel有序,它是由弱的附加相互作用引起的,这些相互作用提高了简并度。结果表明,该临界点属于一个不同于顺磁相外等效跃迁临界点的普适类,它具有有效的长程相互作用特征;或者,排序可以是不连续的。我们认为这种类型的转变可以通过对焦绿石反铁磁体施加单轴应力来实现。
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英文标题:
《Critical phenomena in a highly constrained classical spin system: Neel
ordering from the Coulomb phase》
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作者:
T. S. Pickles, T. E. Saunders and J. T. Chalker
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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一级分类:Physics 物理学
二级分类:Strongly Correlated Electrons 强关联电子
分类描述:Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学,非费米液体,自旋液体,量子临界性,电荷密度波,金属-绝缘体跃迁
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英文摘要:
Many classical, geometrically frustrated antiferromagnets have macroscopically degenerate ground states. In a class of three-dimensional systems, the set of degenerate ground states has power-law correlations and is an example of a Coulomb phase. We investigate Neel ordering from such a Coulomb phase, induced by weak additional interactions that lift the degeneracy. We show that the critical point belongs to a universality class that is different from the one for the equivalent transition out of the paramagnetic phase, and that it is characterised by effective long-range interactions; alternatively, ordering may be discontinuous. We suggest that a transition of this type may be realised by applying uniaxial stress to a pyrochlore antiferromagnet.
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PDF链接:
https://arxiv.org/pdf/708.3791