Higher-order modulations in the skyrmion-lattice phase of Cu$_2$OSeO$_3$

Johannes D. Reim, ∗ Shinnosuke Matsuzaka, † Koya Makino, Seno Aji, Ryo Murasaki, Daiki Higashi, Daisuke Okuyama, Yusuke Nambu, 3, 4 Elliot P. Gilbert, Norman Booth, Shinichiro Seki, 7 Yoshinori Tokura, 7 and Taku J Sato Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan Organization for Advanced Studies, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan FOREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organization, Kirrawee DC, New South Wales 2232, Australia RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Tokyo 113-8656, Japan (Dated: April 20, 2022)