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- Title
Cooperative dynamic polaronic picture of diamond color centers.
- Authors
Ichikawa, Takuto; Guo, Junjie; Fons, Paul; Prananto, Dwi; An, Toshu; Hase, Muneaki
- Abstract
Polarons can control carrier mobility and can also be used in the design of quantum devices. Although much effort has been directed into investigating the nature of polarons, observation of defect-related polarons is challenging due to electron-defect scattering. Here we explore the polaronic behavior of nitrogen-vacancy (NV) centers in a diamond crystal using an ultrafast pump-probe technique. A 10-fs optical pulse acts as a source of high electric field exceeding the dielectric breakdown threshold, in turn exerting a force on the NV charge distribution and polar optical phonons. The electronic and phononic responses are enhanced by an order of magnitude for a low density of NV centers, which we attribute to a combination of cooperative polaronic effects and scattering by defects. First-principles calculations support the presence of dipolar Fröhlich interaction via non-zero Born effective charges. Our findings provide insights into the physics of color centers in diamonds. Polaronic behavior associated with the Jahn-Teller effect has been studied in NV centers in diamond but other types of polarons are possible. Here the authors study electro-optical response of NV centers using ultrafast pump-probe spectroscopy and find an enhancement due to cooperative polaronic effect.
- Subjects
COOPERATIVE binding (Biochemistry); DIAMOND crystals; JAHN-Teller effect; PUMP probe spectroscopy; DIELECTRIC breakdown
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-51366-x