Magnetoelectricity in two-dimensional materials

IF 7.7 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Yìlè Yīng, U. Zülicke
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引用次数: 10

Abstract

ABSTRACT Since the initial isolation of few-layer graphene, a plethora of two-dimensional atomic crystals has become available, covering almost all known materials types including metals, semiconductors, superconductors, ferro- and antiferromagnets. These advances have augmented the already existing variety of two-dimensional materials that are routinely realized by quantum confinement in bulk-semiconductor heterostructures. This review focuses on the type of material for which two-dimensional realizations are still being actively sought: magnetoelectrics. We present an overview of current theoretical expectation and experimental progress towards fabricating low-dimensional versions of such materials that can be magnetized by electric charges and polarized electrically by an applied magnetic field – unusual electromagnetic properties that could be the basis for various useful applications. The interplay between spatial confinement and magnetoelectricity is illustrated using the paradigmatic example of magnetic-monopole fields generated by electric charges in or near magnetoelectric media. For the purpose of this discussion, the image-charge method familiar from electrostatics is extended to solve the boundary-value problem for a magnetoelectric medium in the finite-width slab geometry using image dyons, i.e. point objects having both electric and magnetic charges. We discuss salient features of the magnetoelectrically induced fields arising in the thin-width limit. Graphical abstract
二维材料中的磁电
摘要自从最初分离出单层石墨烯以来,大量的二维原子晶体已经问世,几乎涵盖了所有已知的材料类型,包括金属、半导体、超导体、铁磁体和反铁磁体。这些进步增加了已经存在的各种二维材料,这些材料通常通过体半导体异质结构中的量子限制来实现。这篇综述的重点是仍在积极寻求二维实现的材料类型:磁电。我们概述了目前制造低维材料的理论预期和实验进展,这些材料可以通过电荷磁化,并通过施加的磁场进行电极化——这是一种不寻常的电磁特性,可能是各种有用应用的基础。利用磁电介质中或附近电荷产生的磁单极子场的范例,说明了空间约束和磁电之间的相互作用。为了进行讨论,将静电学中常见的图像电荷方法扩展到使用图像dyon(即同时具有电荷和磁电荷的点对象)求解有限宽度平板几何中磁电介质的边值问题。我们讨论了在薄宽度极限下产生的磁电感应场的显著特征。图形摘要
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来源期刊
Advances in Physics: X
Advances in Physics: X Physics and Astronomy-General Physics and Astronomy
CiteScore
13.60
自引率
0.00%
发文量
37
审稿时长
13 weeks
期刊介绍: Advances in Physics: X is a fully open-access journal that promotes the centrality of physics and physical measurement to modern science and technology. Advances in Physics: X aims to demonstrate the interconnectivity of physics, meaning the intellectual relationships that exist between one branch of physics and another, as well as the influence of physics across (hence the “X”) traditional boundaries into other disciplines including: Chemistry Materials Science Engineering Biology Medicine
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