作者
Chao Lian, Shi-Qi Hu, Jin Zhang, Cai Cheng, Zhe Yuan, Shiwu Gao, Sheng Meng
发表日期
2020/9/11
期刊
Physical Review Letters
卷号
125
期号
11
页码范围
116802
出版商
American Physical Society
简介
The past decade has witnessed numerous discoveries of two-dimensional (2D) semimetals and insulators, whereas 2D metals were rarely identified. Borophene, a monolayer boron sheet, has recently emerged as a perfect 2D metal with unique electronic properties. Here we study collective excitations in borophene, which exhibit two major plasmon modes with low damping rates extending from the infrared to ultraviolet regime. The anisotropic 1D plasmon originates from electronic transitions of tilted Dirac cones in borophene, analogous to that in extreme doped graphene. These features enable borophene as an integrated platform of 1D, 2D, and Dirac plasmons, promising for directional polariton transport and broadband optical communication in next-generation optoelectronic devices.
学术搜索中的文章
C Lian, SQ Hu, J Zhang, C Cheng, Z Yuan, S Gao… - Physical Review Letters, 2020