Investigation of the Physical Mechanism behind Retention Loss in FeFETs with MIFIFIS Gate Structure
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909943439818752 |
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| author | Hu, Tao Chen, Zeqi Han, Runhao Jia, Xinpei Yang, Jia Bai, Mingkai Ji, Ruoyao Ding, Yajing Zhao, Mengwei Li, Yuhan Li, Kaiyi Fan, Wenbo Shao, Xianzhou Sun, Xiaoqing Han, Kai Zhang, Jing Wang, Yanrong Chai, Junshuai Xu, Hao Wang, Xiaolei Wang, Wenwu Ye, Tianchun |
| author_facet | Hu, Tao Chen, Zeqi Han, Runhao Jia, Xinpei Yang, Jia Bai, Mingkai Ji, Ruoyao Ding, Yajing Zhao, Mengwei Li, Yuhan Li, Kaiyi Fan, Wenbo Shao, Xianzhou Sun, Xiaoqing Han, Kai Zhang, Jing Wang, Yanrong Chai, Junshuai Xu, Hao Wang, Xiaolei Wang, Wenwu Ye, Tianchun |
| contents | A Metal-Gate Blocking Layer (GBL)- Ferroelectric-Tunnel Dielectric Layer (TDL)-Ferroelectric -Channel Insulator (Ch.IL)-Si (MIFIFIS) structure is proposed to achieve a larger MW for applications in Fe-NAND. However, the large retention loss (RL) in the MIFIFIS structure restricts its application. In this work, we vary the physical thickness of the GBL and TDL, and conduct an in-depth analysis of the energy bands of the gate structure to investigate the physical mechanism behind the RL in FeFETs with the MIFIFIS structure. The physical origin of the RL is that the electric field direction across the TDL reduces the potential barrier provided by the ferroelectric near the silicon substrate. Based on the above physical mechanism, the RL can be reduced to 12% and 0.2% by redesigning the gate structure or reducing the pulse amplitude, respectively. Our work contributes to a deeper understanding of the physical mechanism behind the RL in FeFETs with the MIFIFIS gate structure. It provides guidance for enhancing the reliability of FeFETs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_04658 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Investigation of the Physical Mechanism behind Retention Loss in FeFETs with MIFIFIS Gate Structure Hu, Tao Chen, Zeqi Han, Runhao Jia, Xinpei Yang, Jia Bai, Mingkai Ji, Ruoyao Ding, Yajing Zhao, Mengwei Li, Yuhan Li, Kaiyi Fan, Wenbo Shao, Xianzhou Sun, Xiaoqing Han, Kai Zhang, Jing Wang, Yanrong Chai, Junshuai Xu, Hao Wang, Xiaolei Wang, Wenwu Ye, Tianchun Applied Physics A Metal-Gate Blocking Layer (GBL)- Ferroelectric-Tunnel Dielectric Layer (TDL)-Ferroelectric -Channel Insulator (Ch.IL)-Si (MIFIFIS) structure is proposed to achieve a larger MW for applications in Fe-NAND. However, the large retention loss (RL) in the MIFIFIS structure restricts its application. In this work, we vary the physical thickness of the GBL and TDL, and conduct an in-depth analysis of the energy bands of the gate structure to investigate the physical mechanism behind the RL in FeFETs with the MIFIFIS structure. The physical origin of the RL is that the electric field direction across the TDL reduces the potential barrier provided by the ferroelectric near the silicon substrate. Based on the above physical mechanism, the RL can be reduced to 12% and 0.2% by redesigning the gate structure or reducing the pulse amplitude, respectively. Our work contributes to a deeper understanding of the physical mechanism behind the RL in FeFETs with the MIFIFIS gate structure. It provides guidance for enhancing the reliability of FeFETs. |
| title | Investigation of the Physical Mechanism behind Retention Loss in FeFETs with MIFIFIS Gate Structure |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2512.04658 |