发帖
雷达卡
摘要翻译：
研究并解决了一类轨道简并量子磁体微观模型的基态问题。假定轨道自由度具有方向性，并用静态Potts类变量表示。在Hund耦合消失的极限下，这种模型的基态流形被晶格的硬核二聚体（自旋单重态）覆盖所跨越。在有限Hund耦合下，通过虚三重态激发，二聚体复盖物的大范围简并被提升。讨论了我们的结果与几个实验研究系统的相关性。
---
英文标题：
《Dimer phases in quantum antiferromagnets with orbital degeneracy》
---
作者：
G. Jackeli and D. A. Ivanov
---
最新提交年份：
2007
---
分类信息：
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
--
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
--
---
英文摘要：
We study and solve the ground-state problem of a microscopic model for a family of orbitally degenerate quantum magnets. The orbital degrees of freedom are assumed to have directional character and are represented by static Potts-like variables. In the limit of vanishing Hund's coupling, the ground-state manifold of such a model is spanned by the hard-core dimer (spin singlet) coverings of the lattice. The extensive degeneracy of dimer coverings is lifted at a finite Hund's coupling through an order-out-of-disorder mechanism by virtual triplet excitations. The relevance of our results to several experimentally studied systems is discussed.
---
PDF链接：
https://arxiv.org/pdf/705.299
京公网安备 11010802022788号
