The structural, electronic and optic properties in a series of M2XY (M = Ga, In; X,Y = S, Se, Te) Janus monolayer materials based on GW and the Bethe-Salpeter equationJianye Liu, Xiuxian Yang, Zhenhong Dai, Yinchang Zhao and Sheng MengEur. Phys. J. B, 93 7 (2020) 137DOI: https://doi.org/10.1140/epjb/e2020-100408-0