Band valley flattening and exciton appearance/disappearance under isotropic strain in monolayer WS2Quang Huy Tran, Thi Nhan Tran, Thi Theu Luong, Van Thanh Ngo, Viet Bac Thi Phung and Van An DinhEur. Phys. J. Plus, 137 12 (2022) 1317DOI: https://doi.org/10.1140/epjp/s13360-022-03537-2