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Chiral tunneling in gated inversion symmetric Weyl semimetal
Based on the chirality-resolved transfer-matrix method, we evaluate the chiral transport tunneling through Weyl semimetal multi-barrier structures created by periodic gates. It is shown that, in sharp contrast to the cases of three dimensional normal semimetals, the tunneling coefficient as a functi...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4758052/ https://www.ncbi.nlm.nih.gov/pubmed/26888491 http://dx.doi.org/10.1038/srep21283 |
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author | Bai, Chunxu Yang, Yanling Chang, Kai |
author_facet | Bai, Chunxu Yang, Yanling Chang, Kai |
author_sort | Bai, Chunxu |
collection | PubMed |
description | Based on the chirality-resolved transfer-matrix method, we evaluate the chiral transport tunneling through Weyl semimetal multi-barrier structures created by periodic gates. It is shown that, in sharp contrast to the cases of three dimensional normal semimetals, the tunneling coefficient as a function of incident angle shows a strong anisotropic behavior. Importantly, the tunneling coefficients display an interesting [Image: see text] periodic oscillation as a function of the crystallographic angle of the structures. With the increasement of the barriers, the tunneling current shows a Fabry-Perot type interferences. For superlattice structures, the fancy miniband effect has been revealed. Our results show that the angular dependence of the first bandgap can be reduced into a Lorentz formula. The disorder suppresses the oscillation of the tunneling conductance, but would not affect its average amplitude. This is in sharp contrast to that in multi-barrier conventional semiconductor structures. Moreover, numerical results for the dependence of the angularly averaged conductance on the incident energy and the structure parameters are presented and contrasted with those in two dimensional relativistic materials. Our work suggests that the gated Weyl semimetal opens a possible new route to access to new type nanoelectronic device. |
format | Online Article Text |
id | pubmed-4758052 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-47580522016-02-26 Chiral tunneling in gated inversion symmetric Weyl semimetal Bai, Chunxu Yang, Yanling Chang, Kai Sci Rep Article Based on the chirality-resolved transfer-matrix method, we evaluate the chiral transport tunneling through Weyl semimetal multi-barrier structures created by periodic gates. It is shown that, in sharp contrast to the cases of three dimensional normal semimetals, the tunneling coefficient as a function of incident angle shows a strong anisotropic behavior. Importantly, the tunneling coefficients display an interesting [Image: see text] periodic oscillation as a function of the crystallographic angle of the structures. With the increasement of the barriers, the tunneling current shows a Fabry-Perot type interferences. For superlattice structures, the fancy miniband effect has been revealed. Our results show that the angular dependence of the first bandgap can be reduced into a Lorentz formula. The disorder suppresses the oscillation of the tunneling conductance, but would not affect its average amplitude. This is in sharp contrast to that in multi-barrier conventional semiconductor structures. Moreover, numerical results for the dependence of the angularly averaged conductance on the incident energy and the structure parameters are presented and contrasted with those in two dimensional relativistic materials. Our work suggests that the gated Weyl semimetal opens a possible new route to access to new type nanoelectronic device. Nature Publishing Group 2016-02-18 /pmc/articles/PMC4758052/ /pubmed/26888491 http://dx.doi.org/10.1038/srep21283 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Bai, Chunxu Yang, Yanling Chang, Kai Chiral tunneling in gated inversion symmetric Weyl semimetal |
title | Chiral tunneling in gated inversion symmetric Weyl semimetal |
title_full | Chiral tunneling in gated inversion symmetric Weyl semimetal |
title_fullStr | Chiral tunneling in gated inversion symmetric Weyl semimetal |
title_full_unstemmed | Chiral tunneling in gated inversion symmetric Weyl semimetal |
title_short | Chiral tunneling in gated inversion symmetric Weyl semimetal |
title_sort | chiral tunneling in gated inversion symmetric weyl semimetal |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4758052/ https://www.ncbi.nlm.nih.gov/pubmed/26888491 http://dx.doi.org/10.1038/srep21283 |
work_keys_str_mv | AT baichunxu chiraltunnelingingatedinversionsymmetricweylsemimetal AT yangyanling chiraltunnelingingatedinversionsymmetricweylsemimetal AT changkai chiraltunnelingingatedinversionsymmetricweylsemimetal |