Enhanced performance of hafnia self-rectifying ferroelectric tunnel junctions at cryogenic temperatures
Abstract The advancement in high-performance computing technologies, including quantum and aerospace systems, necessitates components that operate efficiently at cryogenic temperatures. In this study, we demonstrate a hafnia-based ferroelectric tunnel junction (FTJ) that achieves a record-high tunne...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-12-01
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| Series: | Nano Convergence |
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| Online Access: | https://doi.org/10.1186/s40580-024-00461-2 |
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| author | Junghyeon Hwang Chaeheon Kim Jinho Ahn Sanghun Jeon |
| author_facet | Junghyeon Hwang Chaeheon Kim Jinho Ahn Sanghun Jeon |
| author_sort | Junghyeon Hwang |
| collection | DOAJ |
| description | Abstract The advancement in high-performance computing technologies, including quantum and aerospace systems, necessitates components that operate efficiently at cryogenic temperatures. In this study, we demonstrate a hafnia-based ferroelectric tunnel junction (FTJ) that achieves a record-high tunneling electroresistance (TER) ratio of over 200,000 and decade-long retention characteristics. By introducing asymmetric oxygen vacancies through the strategic use of indium oxide (InOx) layer, we enhance the TER ratio without increasing off-current, addressing the longstanding issue of low on-current in hafnia-based FTJs. Unlike prior approaches that led to leakage currents, our method optimizes tunneling behavior by leveraging the differential oxygen dissociation energy between InOx and hafnium zirconium oxide (HZO). This results in asymmetric modulation of the tunnel barrier, enhancing electron tunneling in one polarization state while maintaining stability in the opposite state. Furthermore, we explore the intrinsic characteristics of the FTJ at cryogenic temperatures, where reduced thermal energy minimizes leakage currents and allows the maximization of device performance. These findings establish a new benchmark for TER in hafnia-based FTJs and provide valuable insights for the integration of these devices into advanced cryogenic memory systems. Graphical Abstract |
| format | Article |
| id | doaj-art-e3203fd83ee345e29d4f18ab27c7b749 |
| institution | Kabale University |
| issn | 2196-5404 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nano Convergence |
| spelling | doaj-art-e3203fd83ee345e29d4f18ab27c7b7492024-12-22T12:40:56ZengSpringerOpenNano Convergence2196-54042024-12-011111910.1186/s40580-024-00461-2Enhanced performance of hafnia self-rectifying ferroelectric tunnel junctions at cryogenic temperaturesJunghyeon Hwang0Chaeheon Kim1Jinho Ahn2Sanghun Jeon3School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST)School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST)Division of Materials Science and Engineering, Hanyang UniversitySchool of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST)Abstract The advancement in high-performance computing technologies, including quantum and aerospace systems, necessitates components that operate efficiently at cryogenic temperatures. In this study, we demonstrate a hafnia-based ferroelectric tunnel junction (FTJ) that achieves a record-high tunneling electroresistance (TER) ratio of over 200,000 and decade-long retention characteristics. By introducing asymmetric oxygen vacancies through the strategic use of indium oxide (InOx) layer, we enhance the TER ratio without increasing off-current, addressing the longstanding issue of low on-current in hafnia-based FTJs. Unlike prior approaches that led to leakage currents, our method optimizes tunneling behavior by leveraging the differential oxygen dissociation energy between InOx and hafnium zirconium oxide (HZO). This results in asymmetric modulation of the tunnel barrier, enhancing electron tunneling in one polarization state while maintaining stability in the opposite state. Furthermore, we explore the intrinsic characteristics of the FTJ at cryogenic temperatures, where reduced thermal energy minimizes leakage currents and allows the maximization of device performance. These findings establish a new benchmark for TER in hafnia-based FTJs and provide valuable insights for the integration of these devices into advanced cryogenic memory systems. Graphical Abstracthttps://doi.org/10.1186/s40580-024-00461-2Ferroelectric tunnel junctionSelf-rectifyingHafnia-based ferroelectricsImprint effectCryogenic |
| spellingShingle | Junghyeon Hwang Chaeheon Kim Jinho Ahn Sanghun Jeon Enhanced performance of hafnia self-rectifying ferroelectric tunnel junctions at cryogenic temperatures Nano Convergence Ferroelectric tunnel junction Self-rectifying Hafnia-based ferroelectrics Imprint effect Cryogenic |
| title | Enhanced performance of hafnia self-rectifying ferroelectric tunnel junctions at cryogenic temperatures |
| title_full | Enhanced performance of hafnia self-rectifying ferroelectric tunnel junctions at cryogenic temperatures |
| title_fullStr | Enhanced performance of hafnia self-rectifying ferroelectric tunnel junctions at cryogenic temperatures |
| title_full_unstemmed | Enhanced performance of hafnia self-rectifying ferroelectric tunnel junctions at cryogenic temperatures |
| title_short | Enhanced performance of hafnia self-rectifying ferroelectric tunnel junctions at cryogenic temperatures |
| title_sort | enhanced performance of hafnia self rectifying ferroelectric tunnel junctions at cryogenic temperatures |
| topic | Ferroelectric tunnel junction Self-rectifying Hafnia-based ferroelectrics Imprint effect Cryogenic |
| url | https://doi.org/10.1186/s40580-024-00461-2 |
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