Phonon-induced valence-charge relocation in cubic BN observed by ultrafast x-ray diffraction

Michael Woerner,Shekhar Priyadarshi,Isabel Gonzalez-Vallejo,Christoph Hauf,Klaus Reimann,Thomas Elsaesser

The International Conference on Ultrafast Phenomena (UP) 2022（2022）

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摘要

Femtosecond x-ray powder diffraction reveals the impact of zone-edge TA-phonon excitations on the valence-charge distribution in cubic BN. Transient charge-density maps show a spatial transfer of valence charge from the interstitial region onto boron and nitrogen atoms.

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