Author(s): Haoran Chen, Yue Chen, Yizi Feng, Ruda Guo, Yuanfei Fan, Hongyue Xu, Tong Wu, Zhongxun Guo, Di Yue, Xiaofeng Jin, Yi Liu, Zhe Yuan, and Yizheng Wu
Careful Fourier analysis resolves harmonics of a higher order than 4, up to the 18th order, in cubic iron films.
[Phys. Rev. Lett. 136, 086704] Published Tue Feb 24, 2026