Giant energy density nitride dielectrics enabled by a paraelectric-metaparaelectric phase transition

Zhijie Liu, Xingyue Ma, Lan Chen, Xiaohong Yan, Jun-Ming Liu, Chun-Gang Duan (), Jorge Íñiguez-González, Di Wu and Yurong Yang ()
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Zhijie Liu: Nanjing University
Xingyue Ma: Nanjing University
Lan Chen: Nanjing University of Posts and Telecommunications
Xiaohong Yan: Nanjing University of Posts and Telecommunications
Jun-Ming Liu: Nanjing University
Chun-Gang Duan: East China Normal University
Jorge Íñiguez-González: Luxembourg Institute of Science and Technology
Di Wu: Nanjing University
Yurong Yang: Nanjing University

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract 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/cm3 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.

Date: 2025
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DOI: 10.1038/s41467-025-58267-7

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