Magnons and magnetic fluctuations in atomically thin MnBi2Te4

• Published in: Nature communications Vol. 13; no. 1; pp. 2527 - 7
• Main Authors: Lujan, David, Choe, Jeongheon, Rodriguez-Vega, Martin, Ye, Zhipeng, Leonardo, Aritz, Nunley, T. Nathan, Chang, Liang-Juan, Lee, Shang-Fan, Yan, Jiaqiang, Fiete, Gregory A., He, Rui, Li, Xiaoqin
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 09.05.2022; Nature Publishing Group; Nature Portfolio
• Subjects: 639/766/119/997; 639/925/357/1018; 639/925/357/997; 639/925/930/527/1821; Anisotropy; Antiferromagnetism; Excitation; Ferromagnetism; Fluctuations; Humanities and Social Sciences; Interlayers; Magnetic fields; Magnetic variations; Magnons; MATERIALS SCIENCE; multidisciplinary; Raman spectroscopy; Robustness; Science; Science (multidisciplinary); Thickness; topological antiferromagnets; Topology

Electron band topology is combined with intrinsic magnetic orders in MnBi 2 Te 4 , leading to novel quantum phases. Here we investigate collective spin excitations (i.e. magnons) and spin fluctuations in atomically thin MnBi 2 Te 4 flakes using Raman spectroscopy. In a two-septuple layer with non-tr...