Nonadiabatic Kohn Anomaly in Heavily Boron-Doped Diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2017-07-06 |
| Journal | Physical Review Letters |
| Authors | Fabio Caruso, Moritz Hoesch, P. Achatz, J. Serrano, M. Krisch |
| Institutions | Universidad Yachay Tech, Institut NĆ©el |
| Citations | 45 |
Abstract
Section titled āAbstractāWe report evidence of a nonadiabatic Kohn anomaly in boron-doped diamond, using a joint theoretical and experimental analysis of the phonon dispersion relations. We demonstrate that standard calculations of phonons using density-functional perturbation theory are unable to reproduce the dispersion relations of the high-energy phonons measured by high-resolution inelastic x-ray scattering. On the contrary, by taking into account nonadiabatic effects within a many-body field-theoretic framework, we obtain excellent agreement with our experimental data. This result indicates a breakdown of the Born-Oppenheimer approximation in the phonon dispersion relations of boron-doped diamond.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2000 - Many-Particle Physics [Crossref]