Observation of ultralong valley lifetime in WSe
2
/MoS
2
heterostructures
(Observation of Ultralong Valley Lifetime in WSe2/MoS2 Heterostructures)
Jonghwan Kim, Chenhao Jin, Bin Chen, Hui Cai, Tao Zhao, Puiyee Lee, Salman Kahn, Kenji Watanabe, Takashi Taniguchi, Sefaattin Tongay, Michael F. Crommie, Feng Wang.