论文标题
在轻度掺杂的kagome U中使用Bogoliubov Fermi表面可能的超导性（1）旋转液体
Possible superconductivity with Bogoliubov Fermi surface in lightly doped Kagome U(1) spin liquid
论文作者
论文摘要
Kagome晶格上的掺杂的T-J模型是否支持外来的超导性。在本文中，我们为该模型提出了一类新的变分状态，并在其上进行大规模的变异蒙特卡洛模拟。所提出的变分状态通过SU（2） - 芯位旋转角进行参数化，因为SU（2） - 芯位结构隐藏在gutzwiller-projempted的平均田地ANSATZ中，用于未蛋型的模型，掺杂时会损坏。这些变分的掺杂状态平稳地连接到先前研究的U（1）$π$ -Flux或$ 0 $ -Flux状态，其中的能量最小化产生了手性非中心的非对称nematic超导状态，具有$ 2 \ times $ 2 $ 2 $ 2 $ - 增强的单元单元。此外，该对密度波状态具有用于Bogoliubov Quasi颗粒的有限费米表面。我们进一步研究了这种有趣的配对状态的实验相关特性。
Whether the doped t-J model on the Kagome lattice supports exotic superconductivity has not been decisively answered. In this paper, we propose a new class of variational states for this model and perform large-scale variational Monte Carlo simulation on it. The proposed variational states are parameterized by the SU(2)-gauge-rotation angles, as the SU(2)-gauge structure hidden in the Gutzwiller-projected mean-field ansatz for the undoped model is broken upon doping. These variational doped states smoothly connect to the previously studied U(1) $π$-flux or $0$-flux states, and energy minimization among them yields a chiral noncentrosymmetric nematic superconducting state with $2 \times 2$-enlarged unit cell. Moreover, this pair density wave state possesses a finite Fermi surface for the Bogoliubov quasi particles. We further study experimentally relevant properties of this intriguing pairing state.
