We show that very long range repulsive interactions of a generalized Coulomb-like form $V(R)\sim R^{-α}$, with $α<d$ ($d$-dimensionality), typically introduce very strong frustration, resulting in extreme fragility of the charge-ordered state. An \textquotedbl{}almost frozen\textquotedbl{} liquid then survives in a broad dynamical range above the (very low) melting temperature $T_{c}$ which is proportional to $α$. This \textquotedbl{}pseudogap\textquotedbl{} phase is characterized by unusual insulating-like, but very weakly temperature dependent transport, similar to experimental findings in certain low carrier density systems.
The Ground State of the ``Frozen'' Electron Phase in Two-Dimensional Narrow-Band Conductors with a Long-Range Interelectron Repulsion. Stripe Formation and Effective Lowering of Dimension
Higgs transition from a magnetic Coulomb liquid to a ferromagnet in Yb_2Ti_2O_7
在一类被称为自旋冰的受抑磁体中，磁单极子作为经典缺陷出现，并通过磁库仑定律相互作用。在量子力学相互作用下，这些磁荷由分馏的玻色子准粒子（自旋子）携带，自旋子可以通过希格斯机制通过一级跃迁进行玻色-爱因斯坦凝聚。在这里，我们报告的证据希格斯过渡从磁性库仑液体铁磁体在单晶Yb 2 Ti 2 O 7。极化中子散射实验表明，在T_C ~ 0.21 K以下，[111]棒扩散散射和夹点特征突然被抑制，此时出现磁布拉格峰和完全去极化的中子自旋，并伴有热滞现象，表明发生了一级铁磁相变。我们的结果是在量子自旋冰模型的基础上解释的，其高温相有效地描述为磁性库仑液体，而基态显示出近共线的铁磁性与带隙自旋激发。
Phase diagram of pyrochlore iridates: all-in-all-out magnetic ordering and non-Fermi liquid properties
采用局域密度近似和动力学平均场论（LDA+DMFT）方法，从第一性原理出发研究了5d烧绿石铱酸盐Y2 Ir 2 O 7的原型结构.我们绘制了温度、库仑排斥力U和填充空间的相图。与实验一致，我们发现，一个全进全出有序绝缘相是稳定的现实值的U。三角晶场增强了jeff=1/2二重态的磁矩，库仑相互作用导致了强的带间关联，表明三带描述是重要的.我们证明了一个实质性的带变窄的顺磁性金属相和非费米液体的行为，在电子/空穴掺杂系统起源于长寿命的准自旋矩引起的近平带。
