Theory of the Hall effect in three-dimensional metamaterials
Theory of the Hall effect in three-dimensional metamaterials
复制标题
三维超材料中的霍尔效应理论
DOI:
10.1088/1367-2630/aad92b
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发表时间:
2018
影响因子:
3.3
通讯作者:
Wegener, Martin
中科院分区:
文献类型:
--
作者:
Kern, Christian;Milton, Graeme W;Kadic, Muamer;Wegener, Martin
We apply homogenization theory to calculate the effective electric conductivity and Hall coefficient tensor of passive three-dimensionally periodic metamaterials subject to a weak external static homogeneous magnetic field. We not only allow for variations of the conductivity and the Hall coefficient of the constituent material (s) within the metamaterial unit cells, but also for spatial variations of the magnetic permeability. We present four results. First, our findings are consistent with previous numerical calculations for finite-size structures as well as with recent experiments. This provides a sound theoretical justification for describing such metamaterials in terms of effective material parameters. Second, we visualize the cofactor fields appearing in the homogenization integrals. Thereby, we identify those parts of the metamaterial structures which are critical for the observed effective metamaterial parameters, providing a unified view onto various previously introduced single-constituent/multiple-constituent and isotropic/anisotropic architectures, respectively. Third, we suggest a novel three-dimensional non-magnetic metamaterial architecture exhibiting a sign reversal of the effective isotropic Hall coefficient. It is conceptually distinct from the original chainmail-like geometry, for which the sign reversal is based on interlinked rings. Fourth, we discuss two examples for metamaterial architectures comprising magnetic materials: yet another possibility to reverse the sign of the isotropic Hall coefficient and an approach to conceptually break previous bounds for the effective mobility.
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影响因子:
3.5
作者:
Mani, Ramesh G.
通讯作者:
Mani, Ramesh G.
影响因子:
29.4
作者:
Bauer, Jens;Meza, Lucas R.;Valdevit, Lorenzo
通讯作者:
Valdevit, Lorenzo
影响因子:
2.5
作者:
M. Briane;G. Milton;V. Nesi
通讯作者:
V. Nesi
DOI:
10.1016/s0764-4442(01)01853-5
发表时间:
2001
期刊:
Comptes Rendus De L Academie Des Sciences Serie I-mathematique
影响因子:
--
作者:
M. Camar;P. Seppecher
通讯作者:
P. Seppecher
影响因子:
8.6
作者:
C. Kern;M. Kadic;M. Wegener
通讯作者:
M. Wegener