Robust edge photocurrent response on layered type II Weyl semimetal WTe2

Qinsheng Wang, Jingchuan Zheng, Yuan He, Jin Cao, Xin Liu, Maoyuan Wang, Junchao Ma, Jiawei Lai, Hong Lu, Shuang Jia, Dayu Yan, Youguo Shi, Junxi Duan, Junfeng Han, Wende Xiao, Jian Hao Chen, Kai Sun, Yugui Yao*, Dong Sun

*此作品的通讯作者

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摘要

Photosensing and energy harvesting based on exotic properties of quantum materials and new operation principles have great potential to break the fundamental performance limit of conventional photodetectors and solar cells. Weyl semimetals have demonstrated novel optoelectronic properties that promise potential applications in photodetection and energy harvesting arising from their gapless linear dispersion and Berry field enhanced nonlinear optical effect at the vicinity of Weyl nodes. In this work, we demonstrate robust photocurrent generation at the edge of Td-WTe2, a type-II Weyl semimetal, due to crystalline-symmetry breaking along certain crystal fracture directions and possibly enhanced by robust fermi-arc type surface states. This edge response is highly generic and arises universally in a wide class of quantum materials with similar crystal symmetries. The robust and generic edge current response provides a charge separation mechanism for photosensing and energy harvesting over broad wavelength range.

源语言英语
文章编号5736
期刊Nature Communications
10
1
DOI
出版状态已出版 - 1 12月 2019

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Wang, Q., Zheng, J., He, Y., Cao, J., Liu, X., Wang, M., Ma, J., Lai, J., Lu, H., Jia, S., Yan, D., Shi, Y., Duan, J., Han, J., Xiao, W., Chen, J. H., Sun, K., Yao, Y., & Sun, D. (2019). Robust edge photocurrent response on layered type II Weyl semimetal WTe2 Nature Communications, 10(1), 文章 5736. https://doi.org/10.1038/s41467-019-13713-1