莫尔分数陈绝缘体中任意子激发的自旋构型
Spin Configurations of Anyonic excitations in Moiré Fractional Chern Insulators
- Georgia State University（佐治亚州立大学）
- University of Manitoba（曼尼托巴大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究考察扭曲双层MoTe2中零场分数陈绝缘体的基本激发，发现1/3填充下形成自旋非极化态，其准粒子电荷在量子点附近局域化，揭示了任意子激发的自旋构型。
AI中文摘要：
我们研究了最近在扭曲双层MoTe$_2$中发现的零场分数陈绝缘体的基本激发性质，特别是其自旋极化。我们发现，与包含单个电子（或空穴）的平面抛物线量子点紧密接近的有限尺寸双层系统，在1/3填充因子下形成不可压缩的自旋非极化分数陈绝缘体。相应的能隙被发现很大，且对量子点与双层之间的间距依赖较弱。我们预测，在与量子点耦合的这种分数陈绝缘体中，自旋非极化的准粒子和准空穴将作为低能基本激发出现。电荷密度结果表明，对于自旋非极化的准粒子，正电荷在自旋翻转分量内强烈局域在带负电的量子点附近，而对于自旋极化的准粒子，这种局域化则不那么明显。
英文摘要：
We have examined the nature of elementary excitations in particular, their spin polarization, in recently discovered zero-field fractional Chern insulator in twisted bilayer MoTe$_2$. We have found that the finite-size bilayer system, in close proximity to a planar parabolic quantum dot containing a single electron (or a hole), forms an incompressible spin-unpolarized fractional Chern insulator at 1/3 filling factor. The corresponding energy gap is found to be large and weakly dependent on the separation between the quantum dot and the bilayer. We predict that in this fractional Chern insulator coupled to a quantum dot, spin-unpolarized quasiparticles and quasiholes are expected to appear as low-energy elementary excitations. The charge density results indicate that, for the spin-unpolarized quasiparticles, the positive charge is strongly localized near the negatively charged QD within the spin-flipped component, whereas for the spin-polarized quasiparticles, such localization is much less pronounced.
