钴硅的 Ab initio Wannier 模型中的 RKKY 相互作用和多极秩序

IF 1.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Journal of the Physical Society of Japan Pub Date : 2024-04-23 DOI:10.7566/jpsj.93.053703

Takemi Yamada, Yuki Yanagi, Keisuke Mitsumoto

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引用次数: 0

摘要

我们计算了金属间化合物 CeCoSi 在 T0 时表现出隐藏非磁性阶的 RKKY 相互作用，并考察了随机相近似中可能存在的多极阶的不稳定性。研究了秩 5 以下的所有 36 种多极相互作用，对于单极 I 和十六极 H0 的非磁性多极，最大电感表现出 q = 0 的反铁磁阶，在单位晶胞中的两个 Ce 原子上产生 f 电子的电荷不平衡。所得到的阶可以解释一些实验。

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RKKY Interactions and Multipole Order in Ab initio Wannier Model of CeCoSi

We calculate the RKKY interactions derived from ab initio calculations for the intermetallic compound CeCoSi exhibiting the hidden nonmagnetic order at T₀ and examine the instability towards possible multipole orders within the random phase approximation. All 36 multipole interactions up to rank 5 are investigated, and the maximum susceptibility exhibits an antiferro order with q = 0 for nonmagnetic multipoles of monopole I and hexadecapole H₀, yielding a charge imbalance of f electrons at two Ce atoms in the unit cell. The obtained order can explain some experiments.

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来源期刊

Journal of the Physical Society of Japan 物理-物理：综合

CiteScore

3.40

自引率

17.60%

发文量

325

审稿时长

3 months

期刊介绍： The papers published in JPSJ should treat fundamental and novel problems of physics scientifically and logically, and contribute to the development in the understanding of physics. The concrete objects are listed below. Subjects Covered JPSJ covers all the fields of physics including (but not restricted to) Elementary particles and fields Nuclear physics Atomic and Molecular Physics Fluid Dynamics Plasma physics Physics of Condensed Matter Metal, Superconductor, Semiconductor, Magnetic Materials, Dielectric Materials Physics of Nanoscale Materials Optics and Quantum Electronics Physics of Complex Systems Mathematical Physics Chemical physics Biophysics Geophysics Astrophysics.