Role of anisotropic electronic friction in laser-driven hydrogen recombination on copper
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866908930738749440 |
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| author | Spears, Alexander Stark, Wojciech G. Maurer, Reinhard J. |
| author_facet | Spears, Alexander Stark, Wojciech G. Maurer, Reinhard J. |
| contents | Ultrafast light-driven chemical dynamics at surfaces are governed by energy transfer from excited electrons to vibrational degrees of freedom. When this nonadiabatic energy transfer is anisotropic, it can lead to dynamical steering effects that affect reaction probabilities or non-thermal final energy distributions in molecules. Here, we use a machine-learning-enabled simulation framework to compare isotropic and anisotropic models of electronic friction during laser-driven hydrogen evolution on the (111) facet of copper. While anisotropic friction strongly determines the rate of energy transfer into the adsorbate and the fluence dependence of reaction probabilities, it has little effect on final translational, vibrational and rotational energy distributions as these are mainly governed by the potential energy landscape at the barrier. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_00709 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Role of anisotropic electronic friction in laser-driven hydrogen recombination on copper Spears, Alexander Stark, Wojciech G. Maurer, Reinhard J. Chemical Physics Ultrafast light-driven chemical dynamics at surfaces are governed by energy transfer from excited electrons to vibrational degrees of freedom. When this nonadiabatic energy transfer is anisotropic, it can lead to dynamical steering effects that affect reaction probabilities or non-thermal final energy distributions in molecules. Here, we use a machine-learning-enabled simulation framework to compare isotropic and anisotropic models of electronic friction during laser-driven hydrogen evolution on the (111) facet of copper. While anisotropic friction strongly determines the rate of energy transfer into the adsorbate and the fluence dependence of reaction probabilities, it has little effect on final translational, vibrational and rotational energy distributions as these are mainly governed by the potential energy landscape at the barrier. |
| title | Role of anisotropic electronic friction in laser-driven hydrogen recombination on copper |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2604.00709 |