Retention Model of TaO/HfO x and TaO/AlO x RRAM with Self-Rectifying Switch Characteristics oleh Yu-De Lin, Pang-Shiu Chen, Heng-Yuan Lee, Yu-Sheng Chen, Sk. Ziaur Rahaman, Kan-Hsueh Tsai, Chien-Hua Hsu, Wei-Su Chen, Pei-Hua Wang, Ya-Chin King, Chrong Jung Lin