广义布洛赫定理和带状结构拓扑学

IF 1.4 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2024-11-01 DOI:10.1134/S0021364024602574

Yu. B. Kudasov

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引用次数: 0

摘要

在一维和二维紧密束缚模型的框架内，研究了具有相称螺旋磁序的金属中的弥散关系。平移的广义布洛赫定理与自旋旋转相结合，再加上博恩-卡曼周期性边界条件，导致了多片状频散曲线（表面）的出现。研究表明，由此产生的带状结构在拓扑上是非琐碎的，这可能导致自旋纹理费米面，并引起输运异常。

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Generalized Bloch Theorem and Band-Structure Topology

Dispersion relations in a metal with a commensurate helical magnetic order are considered in the framework of one- and two-dimensional tight-binding models. The generalized Bloch theorem for translations combined with spin rotations, together with the Born–Karman periodic boundary conditions, leads to the appearance of multisheet dispersion curves (surfaces). It is demonstrated that the resulting band structure is topologically nontrivial, which can lead to a spin textured Fermi surface and cause transport anomalies.

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.