"Electronic charge transfer driven by spin cycloidal structure" Y. Ishii, S. Horio, Y. Noda, M. Hiraishi, H. Okabe, M. Miyazaki, S. Takeshita, A. Koda, K. M. Kojima, R. Kadono, H. Sagayama, H. Nakao, Y. Murakami, and H. Kimura, Phys. Rev B 101 (2020) 224436(1-7).