Observation of terahertz second harmonic generation from Dirac surface states in the topological insulator Bi2Se3RemoveJonathan Stensberg, Xingyue Han, Zhuoliang Ni, Xiong Yao, Xiaoyu Yuan, Debarghya Mallick, Akshat Gandhi, Seongshik Oh, and Liang WuPhys. Rev. B 109, 245112 (2024)
