论文标题
列型抗铁磁性和从电子和电子 - 电子相互作用之间的相互作用的脱合临界性
Nematic Antiferromagnetism and Deconfined Criticality from the Interplay between Electron-Phonon and Electron-Electron Interactions
论文作者
论文摘要
具有强电子耦合的系统通常表现出各种形式的电荷顺序，而强的电子电子相互作用会导致磁性。我们使用行列式量子蒙特卡洛（DQMC）计算来求解具有这些相互作用漫画的正方形晶格上的模型。在电子 - 电子相互作用主导的极限中，它具有抗磁磁性（AF）阶，而电子 - phonon耦合主导的是柱状价值键固体（VBS）阶。我们发现了一个新型的中间阶段，该阶段容纳了共存的列磁和反铁磁阶。我们还发现了Landau-Forbidden的连续量子相变的证据，其中VBS和列明抗磁磁相之间具有新兴的$ O（4）$对称性。
Systems with strong electron-phonon couplings typically exhibit various forms of charge order, while strong electron-electron interactions lead to magnetism. We use determinant quantum Monte Carlo (DQMC) calculations to solve a model on a square lattice with a caricature of these interactions. In the limit where electron-electron interactions dominate it has antiferromagnetic (AF) order, while where electron-phonon coupling dominates there is columnar valence-bond solid (VBS) order. We find a novel intervening phase that hosts coexisting nematic and antiferromagnetic orders. We have also found evidence of a Landau-forbidden continuous quantum phase transition with an emergent $O(4)$ symmetry between the VBS and the nematic antiferromagnetic phases.
