Antiferroelectric negative capacitance from a structural phase transition in zirconia
| Autor: | Michael Hoffmann, Zheng Wang, Nujhat Tasneem, Ahmad Zubair, Prasanna Venkatesan Ravindran, Mengkun Tian, Anthony Arthur Gaskell, Dina Triyoso, Steven Consiglio, Kandabara Tapily, Robert Clark, Jae Hur, Sai Surya Kiran Pentapati, Sung Kyu Lim, Milan Dopita, Shimeng Yu, Winston Chern, Josh Kacher, Sebastian E. Reyes-Lillo, Dimitri Antoniadis, Jayakanth Ravichandran, Stefan Slesazeck, Thomas Mikolajick, Asif Islam Khan |
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| Rok vydání: | 2021 |
| Předmět: |
Condensed Matter - Materials Science
Condensed Matter::Materials Science Multidisciplinary Affordable and Clean Energy General Physics and Astronomy Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences General Chemistry Physics - Applied Physics Applied Physics (physics.app-ph) General Biochemistry Genetics and Molecular Biology |
| Zdroj: | Nature communications, vol 13, iss 1 |
| DOI: | 10.48550/arxiv.2104.10811 |
| Popis: | Crystalline materials with broken inversion symmetry can exhibit a spontaneous electric polarization, which originates from a microscopic electric dipole moment. Long-range polar or anti-polar order of such permanent dipoles gives rise to ferroelectricity or antiferroelectricity, respectively. However, the recently discovered antiferroelectrics of fluorite structure (HfO2 and ZrO2) are different: A non-polar phase transforms into a polar phase by spontaneous inversion symmetry breaking upon the application of an electric field. Here, we show that this structural transition in antiferroelectric ZrO2 gives rise to a negative capacitance, which is promising for overcoming the fundamental limits of energy efficiency in electronics. Our findings provide insight into the thermodynamically forbidden region of the antiferroelectric transition in ZrO2 and extend the concept of negative capacitance beyond ferroelectricity. This shows that negative capacitance is a more general phenomenon than previously thought and can be expected in a much broader range of materials exhibiting structural phase transitions. |
| Databáze: | OpenAIRE |
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