在无公度填充下的自旋费米子梯：Phase diagram，局域微扰和离子势
Spinful fermionic ladders at incommensurate filling: Phase diagram, local perturbations, and ionic potentials
摘要：
研究了外势对费米子两腿梯形模型输运性质的影响。系统对局部扰动的响应强烈地依赖于系统的基态性质，特别是依赖于主导关联。我们对模型中的所有阶段和过渡进行分类（用于无公度填充），并引入系统随着链间跳跃从零开始增加而经历的“跳跃驱动的过渡”。我们还描述了系统的离子电位的响应。这种效应的物理性质类似于单一杂质的物理性质，不同之处在于离子势可以影响系统的体性质，特别是诱导真正的长程序。
英文摘要：
We study the effect of external potential on transport properties of the fermionic two-leg ladder model. The response of the system to a local perturbation is strongly dependent on the ground state properties of the system and especially on the dominant correlations. We categorise all phases and transitions in the model (for incommensurate filling) and introduce "hopping-driven transitions" that the system undergoes as the inter-chain hopping is increased from zero. We also describe the response of the system to an ionic potential. The physics of this effect is similar to that of the single impurity, except that the ionic potential can affect the bulk properties of the system and in particular induce true long range order.
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