High-harmonic generation in Weyl semimetal beta-WP2 crystals

doi:10.1038/s41467-021-26766-y

	High-harmonic generation in Weyl semimetal beta-WP2 crystals
	Lv, Yang-Yang 1,2; Xu, Jinlong 1,2; Han, Shuang 1,2; Zhang, Chi 1,2; Han, Yadong 3; Zhou, Jian 1,2; Yao, Shu-Hua 1,2; Liu, Xiao-Ping4 ; Lu, Ming-Hui 1,2; Weng, Hongming 5; Xie, Zhenda 1,2; Chen, Y. B.1,2; Hu, Jianbo 3; Chen, Yan-Feng 1,2; Zhu, Shining 1,2
	2021-11-08
发表期刊	NATURE COMMUNICATIONS
EISSN	2041-1723
卷号	12 期号:1
DOI	10.1038/s41467-021-26766-y
摘要	As a quantum material, Weyl semimetal has a series of electronic-band-structure features, including Weyl points with left and right chirality and corresponding Berry curvature, which have been observed in experiments. These band-structure features also lead to some unique nonlinear properties, especially high-order harmonic generation (HHG) due to the dynamic process of electrons under strong laser excitation, which has remained unexplored previously. Herein, we obtain effective HHG in type-II Weyl semimetal beta-WP2 crystals, where both odd and even orders are observed, with spectra extending into the vacuum ultraviolet region (190 nm, 10th order), even under fairly low femtosecond laser intensity. In-depth studies have interpreted that odd-order harmonics come from the Bloch electron oscillation, while even orders are attributed to Bloch oscillations under the spike-like Berry curvature at Weyl points. With crystallographic orientation-dependent HHG spectra, we further quantitatively retrieved the electronic band structure and Berry curvature of beta-WP2. These findings may open the door for exploiting metallic/semimetallic states as solid platforms for deep ultraviolet radiation and offer an all-optical and pragmatic solution to characterize the complicated multiband electronic structure and Berry curvature of quantum topological materials. Weyl semimetals have interesting band-structure features that lead to unique properties. Here, the authors observe and study high-harmonic generation in type-II Weyl semimetal beta-WP2 crystals.
URL	查看原文
收录类别	SCIE
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000715934900002
出版者	NATURE PORTFOLIO
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/130302
专题	物质科学与技术学院_PI研究组_刘晓平组
通讯作者	Xu, Jinlong; Yao, Shu-Hua; Xie, Zhenda; Chen, Y. B.
作者单位	1.Nanjing Univ, Coll Engn & Appl Sci, Sch Elect Sci & Engn, Natl Lab Solid State Microstruct,Sch Phys, Nanjing 210093, Peoples R China; 2.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China; 3.China Acad Engn Phys, Inst Fluid Phys, Lab Shock Wave & Detonat Phys, Mianyang 621900, Sichuan, Peoples R China; 4.Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China; 5.Inst Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Lv, Yang-Yang,Xu, Jinlong,Han, Shuang,et al. High-harmonic generation in Weyl semimetal beta-WP2 crystals[J]. NATURE COMMUNICATIONS,2021,12(1).
APA	Lv, Yang-Yang.,Xu, Jinlong.,Han, Shuang.,Zhang, Chi.,Han, Yadong.,...&Zhu, Shining.(2021).High-harmonic generation in Weyl semimetal beta-WP2 crystals.NATURE COMMUNICATIONS,12(1).
MLA	Lv, Yang-Yang,et al."High-harmonic generation in Weyl semimetal beta-WP2 crystals".NATURE COMMUNICATIONS 12.1(2021).