High-order harmonic generations in tilted Weyl semimetals

作     者：Zi-Yuan Li Qi Li Zhou Li 李子元;李骐;李舟

作者机构：GBA Branch of Aerospace Information Research InstituteChinese Academy of SciencesGuangzhou 510700China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第12期

页      面：242-251页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：performed at the Chinese Academy of Science Terahertz Science Center supported by the National Natural Science Foundation of China(Grant No.61988102) 

主　　题：high order harmonic generation nonlinear optics Weyl semimetals 

摘      要：We investigate high-order harmonic generations(HHGs)under comparison of Weyl cones in two *** to the hyperboloidal electron pocket structure,strong noncentrosymmetrical generations in high orders are observed around a single type-ⅡWeyl point,especially at zero *** a remarkable DC signal is proved to have attributions from the intraband transition after spectral *** weak pulse electric field,the linear optical response of a nontilted Weyl cone is consistent with the Kubo *** extensive numerical simulations,we conclude that the non-zero chemical potential can enhance the even-order generations,from the slightly tilted system to the over-tilted *** consideration of dynamical symmetries,type-Ⅰand type-ⅡWeyl cones also show different selective responses under the circularly polarized ***,using a more realistic model containing two pairs of Weyl points,we demonstrate that paired Weyl points with opposite chirality can suppress the overall even-order generations.