Memory Window Expansion for Ferroelectric FET based Multilevel NVM: Hybrid Solution with Combination of Polarization and Injected Charges. - Jae-Gil Lee; Joongsik Kim; Dong Ik Suh; Ildo Kim; Gwon Deok Han; Seung Wook Ryu; Seho Lee; Myung-Hee Na; Seonyong Cha; Hyeon Woo Park; Cheol Seong Hwang (IMW, 2022)