Optical signatures of interlayer electron coherence in a bilayer semiconductor
Xiaoling Liu, Nadine Leisgang, Pavel E. Dolgirev, Alexander A. Zibrov, Jiho Sung, Jue Wang, Takashi Taniguchi, Kenji Watanabe, Valentin Walther, Hongkun Park, Eugene Demler, Philip Kim, Mikhail D. Lukin.