Author(s): J.-N. Schmidt, J. Hertkorn, M. Guo, F. Böttcher, M. Schmidt, K. S. H. Ng, S. D. Graham, T. Langen, M. Zwierlein, and T. Pfau
Radial and angular roton excitations are observed in an oblate dipolar Bose-Einstein condensate around the phase transition to a 2D droplet crystal.
[Phys. Rev. Lett. 126, 193002] Published Wed May 12, 2021