Anharmonic coupling between electrons and TO phonons in the vicinity of a ferroelectric quantum critical point
We explore a mechanism that allows to couple electrons with the transverse-optical (TO) phonon branch in a regime when the TO mode becomes highly anharmonic and drives the ferroelectric phase transition. We show that this anharmonicity, which leads to a collective motion of ions, is able to couple e...
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| Format: | Article |
| Langue: | English |
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American Physical Society
2020-02-01
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| Collection: | Physical Review Research |
| Accès en ligne: | http://doi.org/10.1103/PhysRevResearch.2.012048 |