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Accessing the anisotropic non-thermal phonon populations in black phosphorus

MPS-Authors
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Seiler,  Helene
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Zahn,  Daniela
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Zacharias,  Marios
Theory, Fritz Haber Institute, Max Planck Society;
Department of Mechanical and Materials Science Engineering, Cyprus University of Technology;

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Hildebrandt,  Patrick-Nigel
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Vasileiadis,  Thomas
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Windsor,  Yaov William
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Qi,  Yingpeng
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Carbogno,  Christian
Theory, Fritz Haber Institute, Max Planck Society;

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Ernstorfer,  Ralph
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

2006.12873.pdf
(Preprint), 5MB

Supplementary Material (public)
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Citation

Seiler, H., Zahn, D., Zacharias, M., Hildebrandt, P.-N., Vasileiadis, T., Windsor, Y. W., et al. (in preparation). Accessing the anisotropic non-thermal phonon populations in black phosphorus.


Cite as: http://hdl.handle.net/21.11116/0000-0006-A16E-9
Abstract
Microscopic scattering processes in solids are governed by the symmetry and anisotropy of the electronic and phononic structures. Femtosecond electron inelastic scattering experiments reveal a momentum-resolved picture of transient anisotropic phonon populations in photoexcited black phosphorus. Based on many-body calculations of the electron-phonon and phonon-phonon interactions, we developed an approach to predict the influence of the non-equilibrium lattice dynamics on the structure factor. By directly comparing the experimental and calculated structure factors, we demonstrate that the anisotropic conduction band is at the origin of the non-thermal phonon population and that our model reproduces the subsequent lattice thermalization.