期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 31, 期 30, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-648X/ab17b3
关键词
surface plasmon polaritons; Weyl semimetals; axion-electromagnetic waves
资金
- JST CREST [JPMJCR14F1]
- JST Nanotech CUPAL
We theoretically investigate surface plasmon polaritons propagating in the thin-film Weyl semimetals. We show how the properties of surface plasmon polaritons are affected by hybridization between plasmons localized at the two metal-dielectric interfaces. Generally, this hybridization results in new mixed plasmon modes, which are called short-range surface plasmons and long-range surface plasmons, respectively. We calculate dispersion curves of these mixed modes for three principle configurations of the axion vector describing axial anomaly in Weyl semimetals. We show that the partial lack of the dispersion and the nonreciprocity can be controlled by fine-tuning of the thickness of the Weyl semimetals, the dielectric constants of the outer insulators, and the direction of the axion vector.
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