原子级薄铁磁体中的磁振子流体动力学

Ruolan Xue1*†, Nikola Maksimovic2*†, Pavel E. Dolgirev2, Li- Qiao Xia3, Aaron Müller4, Ryota Kitagawa5, Francisco Machado2,6, Dahlia R. Klein3,7, David MacNeill3, Kenji Watanabe8, Takashi Taniguchi8, Pablo Jarillo- Herrero3, Mikhail D. Lukin2, Eugene Demler4, Amir Yacoby1,2* Strong interactions between particles can lead to emergent collective excitations. Spin waves, known as magnons, have been predicted to reach a strongly interacting hydrodynamic regime, where they form a slow collective density mode. In this work, we isolate exfoliated sheets of chromium trichloride (CrCl3), where magnon interactions are strong, and develop a technique to measure the collective magnon dynamics though nearby nitrogen- vacancy centers in diamond. …