论文标题
与库仑相互作用的准1D材料中的tomonaga-luttinger液体的参数
Parameters of Tomonaga-Luttinger liquid in a quasi-1D material with Coulomb interactions
论文作者
论文摘要
在这项工作中，我们得出了一种新方案，以计算出tomonaga-luttinger液体（TLL）参数和Holon（电荷模式）速度，以一种准1D材料中的速度，该材料由库仑相互作用耦合的两腿梯子组成。首先，我们获得了沿导电轴的电子电子相互作用电位的分析公式，以垂直于其平面中的广义电荷分布。在第二步中，我们引入了准1D材料中存在的多体筛选。为此，我们提出了用于电荷易感性的新近似值。基于此，我们能够找到TLL的参数和速度。然后，我们展示如何使用它们来验证最近在$ nbse_3 $中以p偏振化测量的实验ARPES数据。尽管我们将研究重点放在这种特定材料上，但它适用于由两腿梯子组成的任何准1D系统。
In this work we derive a new scheme to calculate Tomonaga-Luttinger liquid (TLL) parameters and holon (charge modes) velocities in a quasi-1D material that consists of two-leg ladders coupled through Coulomb interactions. Firstly, we obtain an analytic formula for electron-electron interaction potential along the conducting axis for a generalized charge distribution in a plane perpendicular to it. In the second step we introduce many-body screening that is present in a quasi-1D material. To this end we propose a new approximation for the charge susceptibility. Based on this we are able to find the TLL's parameters and velocities. We then show how to use these to validate the experimental ARPES data measured recently in p-polarization in $NbSe_3$. Although we focus our study on this specific material it is applicable for any quasi-1D system that consists of two-leg ladders as basic units.
