What does this research mean for the field?

In graphene, optical phonons strongly suppress high harmonic generation by causing harmonic phase scrambling, and thermal phonons dominate electron decoherence in strong fields at attosecond timescales. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.CHALLENGES_CONSENSUS.

What question did this study set out to answer?

This research aims to investigate the role of optical phonons in high harmonic generation (HHG) and electron dephasing in graphene.

July 6, 2026The Journal of Physical Chemistry LettersOpen Access

Role of Ultrafast Electron-Thermal-Phonon Interactions in High Harmonic Generation and Dephasing from Graphene

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Authors

AHAdam HerlingForschungszentrum Jülich ONOfer NeufeldTechnion – Israel Institute of Technology

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Implication

Theoretical study shows electron-phonon interactions impact high harmonic generation in graphene, suggesting new experimental pathways.

Key Points

This research aims to investigate the role of optical phonons in high harmonic generation (HHG) and electron dephasing in graphene.
Theoretically studied HHG in graphene by including optical phonons in a static limit.
Computed HHG by sampling thermally occupied phonons and ensemble-averaging.
Examined electron-phonon interactions on attosecond timescales.
Optical phonons suppress HHG by coupling with interband currents, causing phase scrambling.
HHG yields show a weak temperature dependence due to freezing of phonon modes.
Thermal phonons dephase interband coherences at a rate equivalent to T2 ∼ 5.7 fs.

Cite This Study

Herling et al. (2026) studied this question.

synapsesocial.com/papers/6a4b45da997070ff83b5b806 https://doi.org/10.1021/acs.jpclett.6c01354

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Role of Ultrafast Electron-Thermal-Phonon Interactions in High Harmonic Generation and Dephasing from Graphene

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Cite This Study

Role of Ultrafast Electron-Thermal-Phonon Interactions in High Harmonic Generation and Dephasing from Graphene

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Cite This Study

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