具有四亚晶格超晶格的类石墨烯海森堡体系的磁性

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Physica B-condensed Matter Pub Date : 2025-05-14 DOI:10.1016/j.physb.2025.417376

Xin Liu, Shuangshuang Liu, Xiuli Kai, Fan Zhang

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引用次数: 0

摘要

利用线性自旋波理论研究了具有四亚晶格超晶格的类石墨烯海森堡体系的磁性。自旋波谱有四个分支和两个能隙。分析了层内交换耦合和各向异性对能隙宽度的影响，特别是当亚晶格A的自旋变化时。这些结果有助于优化能隙和自旋波共振频率。在低温下，磁矩几乎保持恒定，然后随着温度的升高而减小。在基态，量子涨落使亚晶格磁矩降低到经典值以下。由于量子涨落、热波动和自旋受挫，亚晶格C和D在磁矩处显示一个交叉点。

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Magnetic properties of a graphene-like Heisenberg system with four-sublattice superlattice

The magnetic properties of a graphene-like Heisenberg system with four-sublattice superlattice are studied using the linear spin-wave theory. The spin-wave spectra have four branches with two energy gaps. The effects of intralayer exchange coupling and anisotropy on the energy gap width are analyzed, especially when the spin of sublattice A varies. These results help optimizing energy gaps and spin-wave resonance frequencies. At low temperature, magnetic moments remain nearly constant before decreasing with increasing temperature. At ground state, quantum fluctuations reduce sublattice magnetic moments below classical values. Sublattices C and D show a crossing point at their magnetic moments due to quantum, thermal fluctuations and spin frustration.

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces