非克拉默双特系统中的多极天芒晶体

IF 8.1 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Physical review letters Pub Date : 2024-11-07 DOI:10.1103/physrevlett.133.196702

Hao Zhang, Shi-Zeng Lin

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引用次数: 0

摘要

我们研究了多极磁矩与三角形晶格上的传导电子相互作用的 Kondo 晶格模型。在多极磁矩之间有效的 Ruderman-Kittel-Kasuya-Yosida 相互作用中，依赖于键的电子跳动会引起罗盘状的各向异性。这种独特的各向异性使多极天磁晶体在零磁场下保持稳定。在一个单位晶胞中，skyrmion 分化为美仑复合体，受制于总拓扑电荷守恒。相图中多样的多极相会产生传导电子的新颖自发霍尔响应。

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Multipolar Skyrmion Crystals in Non-Kramers Doublet Systems

We study the Kondo lattice model of multipolar magnetic moments interacting with conduction electrons on a triangular lattice. Bond-dependent electron hoppings induce a compasslike anisotropy in the effective Ruderman-Kittel-Kasuya-Yosida interaction between multipolar moments. This unique anisotropy stabilizes multipolar skyrmion crystals at zero magnetic field. In a unit cell, the skyrmion fractionalizes into meron composites subject to the conservation of total topological charge. Diverse multipolar phases in the phase diagram give rise to novel spontaneous Hall response of conduction electrons.

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来源期刊

Physical review letters 物理-物理：综合

CiteScore

16.50

自引率

7.00%

发文量

2673

审稿时长

2.2 months

期刊介绍： Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks