Selenene has been predicted as a new member of an atomically thin 2D crystalline material family as of last year. With first principle calculations, two different stable phases of selenene, one with the 1T-MoS2-like structure (α-Se) and the other with alternating arrangement structure of deformed four-membered and six-membered rings (b-Se) are identified. Further research indicates that monolayer α-Se exhibits excellent bipolar conductivity, possessing rather high hole mobility close to that of graphene, and monolayer b-Se shows a robust in-p...
