费米子利布晶格的动态传导性

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

Brazilian Journal of Physics Pub Date : 2024-08-14 DOI:10.1007/s13538-024-01574-z

A. S. T. Pires

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引用次数: 0

摘要

在李布晶格上，每个单胞包含三个原子，其能谱具有三带结构，其中一个平带与两个色散带在一个点上相接触。自旋轨道耦合项不会影响平带。然而，它打开了平带和上下色散带之间的间隙，产生了一个非对称的本征贝里相，从而导致拓扑自旋输运特征。我们计算了横向霍尔电导率和动态纵向电导率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Dynamical Conductivities for the Fermionic Lieb Lattice

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Dynamical Conductivities for the Fermionic Lieb Lattice

On the Lieb lattice, each unit cell contains three atoms, and its energy spectrum has a three-band structure, with a flat band touching two dispersive bands at a single point. The spin–orbit coupling term does not affect the flat band. However, it opens the gap between the flat and upper and lower dispersive bands, generating a nontrivial intrinsic Berry phase that leads to topological spin transport features. We calculate the transverse Hall conductivity and the dynamical longitudinal conductivity.

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来源期刊

Brazilian Journal of Physics 物理-物理：综合

CiteScore

2.50

自引率

6.20%

发文量

189

审稿时长

6.0 months

期刊介绍： The Brazilian Journal of Physics is a peer-reviewed international journal published by the Brazilian Physical Society (SBF). The journal publishes new and original research results from all areas of physics, obtained in Brazil and from anywhere else in the world. Contents include theoretical, practical and experimental papers as well as high-quality review papers. Submissions should follow the generally accepted structure for journal articles with basic elements: title, abstract, introduction, results, conclusions, and references.