论文标题
SU（2）二维Hubbard模型中伪随的量规理论
SU(2) gauge theory of the pseudogap phase in the two-dimensional Hubbard model
论文作者
论文摘要
我们提出了二维哈伯德模型中波动磁性波动的SU（2）仪表理论。该理论基于费米克式和玻色旋子中电子的分数化。 Chargons在密度依赖性过渡温度$ T^*$以下进行Néel或螺旋磁顺序。旋转方向的波动是通过Spinon动作梯度扩展获得的非线性Sigma模型来描述的。自旋刚度是从重新归一化组改进的随机相位近似计算的。我们的近似值适用于弱或中度的哈伯德相互作用。 Spinon波动可以在任何有限温度下防止电子的磁性长距离顺序。具有磁性炭序的相位表现出许多特征，这些功能表征了高$ T_C $ cuprates中的伪制剂：强烈降低了电荷载体密度，自旋间隙，Fermi Arcs和Electronic Nematicities。
We present a SU(2) gauge theory of fluctuating magnetic order in the two-dimensional Hubbard model. The theory is based on a fractionalization of electrons in fermionic chargons and bosonic spinons. The chargons undergo Néel or spiral magnetic order below a density dependent transition temperature $T^*$. Fluctuations of the spin orientation are described by a non-linear sigma model obtained from a gradient expansion of the spinon action. The spin stiffnesses are computed from a renormalization group improved random phase approximation. Our approximations are applicable for a weak or moderate Hubbard interaction. The spinon fluctuations prevent magnetic long-range order of the electrons at any finite temperature. The phase with magnetic chargon order exhibits many features characterizing the pseudogap regime in high-$T_c$ cuprates: a strong reduction of charge carrier density, a spin gap, Fermi arcs, and electronic nematicity.
