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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.13027 |
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| _version_ | 1866909539453894656 |
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| author | Liu, Zhijie Ma, Xingyue Chen, Lan Yan, Xiaohong Liu, Jun-Ming Duan, Chun-Gang Íñiguez-González, Jorge Wu, Di Yang, Yurong |
| author_facet | Liu, Zhijie Ma, Xingyue Chen, Lan Yan, Xiaohong Liu, Jun-Ming Duan, Chun-Gang Íñiguez-González, Jorge Wu, Di Yang, Yurong |
| contents | Electrostatic dielectric capacitors are foundational to advance the electronics and electric power devices due to their ultrafast charging/discharging capability and high-power density. However, the low energy density limits the potential for next generation devices in terms of miniaturization and integration. We propose a strategy that relies on inducing a field-driven phase transition that we denote paraelectric-metaparaelectric, which yields an ultrahigh energy density in III-nitrides. III-nitride compounds (Al, Sc, B)N with certain cation concentrations possess a nonpolar hexagonal ground phase which could transform into a polar wurtzite phase under a very large electric field, which is denoted as metaparaelectric with nearly null hysteresis P-E loop. This paraelectric-metaparaelectric transition leads to a polarization saturation at large electric field. The corresponding P-E loop displays a giant energy density of 308 J/cm$^3$ with high efficiency nearly 100%. The proposed paraelectric-metaparaelectric phase transition strategy in nitrides opens an avenue to design of next generation high performance dielectrics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_13027 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Giant energy density nitride dielectrics enabled by a paraelectric-metaparaelectric phase transition Liu, Zhijie Ma, Xingyue Chen, Lan Yan, Xiaohong Liu, Jun-Ming Duan, Chun-Gang Íñiguez-González, Jorge Wu, Di Yang, Yurong Materials Science Computational Physics Electrostatic dielectric capacitors are foundational to advance the electronics and electric power devices due to their ultrafast charging/discharging capability and high-power density. However, the low energy density limits the potential for next generation devices in terms of miniaturization and integration. We propose a strategy that relies on inducing a field-driven phase transition that we denote paraelectric-metaparaelectric, which yields an ultrahigh energy density in III-nitrides. III-nitride compounds (Al, Sc, B)N with certain cation concentrations possess a nonpolar hexagonal ground phase which could transform into a polar wurtzite phase under a very large electric field, which is denoted as metaparaelectric with nearly null hysteresis P-E loop. This paraelectric-metaparaelectric transition leads to a polarization saturation at large electric field. The corresponding P-E loop displays a giant energy density of 308 J/cm$^3$ with high efficiency nearly 100%. The proposed paraelectric-metaparaelectric phase transition strategy in nitrides opens an avenue to design of next generation high performance dielectrics. |
| title | Giant energy density nitride dielectrics enabled by a paraelectric-metaparaelectric phase transition |
| topic | Materials Science Computational Physics |
| url | https://arxiv.org/abs/2503.13027 |