Anharmonic stabilization of ferrielectricity in CuInP_{2}Se_{6}
Using first-principles calculations and group-theory-based models, we study the stabilization of ferrielectricity (FiE) in CuInP_{2}Se_{6}. We find that the FiE ground state is stabilized by a large anharmonic coupling between the polar mode and a fully symmetric Raman-active mode. Our results open...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-02-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.013094 |
| Summary: | Using first-principles calculations and group-theory-based models, we study the stabilization of ferrielectricity (FiE) in CuInP_{2}Se_{6}. We find that the FiE ground state is stabilized by a large anharmonic coupling between the polar mode and a fully symmetric Raman-active mode. Our results open possibilities for controlling the single-step switching barrier for polarization by tuning the Raman-active mode. We discuss the implications of our findings in the context of designing next-generation optoelectronic devices that can overcome the voltage-time dilemma. |
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| ISSN: | 2643-1564 |