Limits of the phonon quasi-particle picture at the cubic-to-tetragonal phase transition in halide perovskites
Abstract The soft modes associated with continuous-order phase transitions are associated with strong anharmonicity. This leads to the overdamped limit where the phonon quasi-particle picture can break down. However, this limit is commonly restricted to a narrow temperature range, making it difficul...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-07-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-023-01297-8 |