How Much Topological Insulation Does One Need? How Much Can One Get?

被引：0

作者：

Lakhtakia, Akhlesh ^{[1
]}

Mackay, Tom G. ^{[2
,3
]}

Chiadini, Francesco ^{[4
]}

Diovisalvi, Annunziata ^{[5
]}

Fiumara, Vincenzo ^{[5
]}

Scaglione, Antonio ^{[6
]}

机构：

[1] Penn State Univ, Dept Engn Sci & Mech, 227 Hammond Bldg, University Pk, PA 16802 USA

[2] Univ Edinburgh, Sch Math, Edinburgh EH9 3FD, Midlothian, Scotland

[3] Univ Edinburgh, Maxwell Inst Math Sci, Edinburgh EH9 3FD, Midlothian, Scotland

[4] Univ Salerno, Dept Ind Engn, I-84084 Fisciano, Italy

[5] Univ Basilicata, Sch Engn, I-85100 Potenza, Italy

[6] Univ Salerno, Dept Ind Engn, I-84084 Fisciano, Italy

来源：

2017 INTERNATIONAL CONFERENCE ON ELECTROMAGNETICS IN ADVANCED APPLICATIONS (ICEAA) | 2017年

关键词：

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Topological insulators (TIs) have taken electromagnetic-engineering research by a storm this decade, and numerous theoretical papers have been published after modeling a TI as a nonreciprocal biisotropic material. As the TI phenomenon macroscopically is manifested only at boundaries, the assumed nonreciprocity in the bulk is fallacious. The TI phenomenon is better accommodated as a boundary condition indicating the presence of conducting states of a specific type. Theory shows that the TI effects in the free space surrounding a region occupied by a TI material do not depend on the specific model chosen. We have collectively examined frequency-domain scattering by planar surfaces, TI-coated gratings, and spheres in order to answer the first question in the title of this presentation. Our answer is: a lot. Based on a review of experimental data available on a variety of chalcogenide TIs, our answer to the second question in the title of this presentation is: much less.

引用

页码：729 / 732

页数：4

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