论文标题
在强耦合时，高自旋近旋近山模型的电气和磁性特性
Electric and Magnetic Properties of Higher-Spin Kondo-Heisenberg Models at Strong Coupling
论文作者
论文摘要
我们研究了一维的近代建模模型的高旋转（$ s \ geq 1 $）的概括，其中近kondo lattice模型的当地旋转$ s $ s $ suments彼此通过反铁磁性海森贝格的互动（$ j _ {$ j {\ text {\ h}} $），通过分析和numical andical和numerical和numerical和numerical和numerical和numerical andical和numerical andical andical和numical方法。强耦合（即大型近耦合）膨胀在半填充时绘制了一个绝缘阶段，其磁相关取决于$ 2S $的平等性以及铁电磁金属相，该阶段占主导地位，该阶段占主导地位的强量耦合区域。然后，我们对$ s = 1 $进行了密度 - 矩阵的重归其化组（DMRG）仿真，以密切研究大但有限的围绕耦合的相结构。在半填充时，近藤耦合和$ j {\ text {h}} $没有竞争，并且绝缘无隙相位稳定，而两者的竞争则导致强耦合的铁磁性逐步崩溃，通过与中间的二次二聚体相对于跨性别的旋转Corpling a Quilleration farne properthing atermantion forneprolling prothering prosehing a Quilling forneprolling，这逐步崩溃了。
We study higher-spin ($S \geq 1$) generalization of the one-dimensional Kondo-Heisenberg model, in which the local spin-$S$ moments of the Kondo lattice model interact with each other via the antiferromagnetic Heisenberg interaction ($J_{\text{H}}$), by analytical and numerical methods. The strong-coupling (i.e., large Kondo-coupling) expansion maps out an insulating phase at half-filling whose magnetic correlation depends on the parity of $2S$ as well as a ferromagnetic metallic phase which dominates the strong-coupling region at generic fillings. Then, we carried out the Density-Matrix Renormalization Group (DMRG) simulations for $S=1$ to closely investigate the phase structure at large but finite Kondo coupling. At half-filling, the Kondo coupling and $J_{\text{H}}$ do not compete and the insulating spin-gapless phase is stable, while the competition of the two leads to a stepwise collapse of the strong-coupling ferromagnetism via an intervening dimerized insulating phase with power-law spin correlation at quarter-filling.
