Theoretical study of the ultrashort dynamics in graphene after fs-laser excitation
We report on the calculation of the full dynamics of graphene after ultrafast laser excitation using ab-initio molecular dynamics simulations. Our calculations show a biexponential decay of the (100) and (110) Bragg peaks in time, similar to experimental results. Furthermore, we calculate the time-e...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2019-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2019/10/epjconf_up2019_05006.pdf |
| _version_ | 1818863085589364736 |
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| author | Sergej Krylow Martin E. Garcia |
| author_facet | Sergej Krylow Martin E. Garcia |
| author_sort | Sergej Krylow |
| collection | DOAJ |
| description | We report on the calculation of the full dynamics of graphene after ultrafast laser excitation using ab-initio molecular dynamics simulations. Our calculations show a biexponential decay of the (100) and (110) Bragg peaks in time, similar to experimental results. Furthermore, we calculate the time-evolution of the phonon energies averaged over sets of phonons, chosen by their phonon frequencies. Our results suggest that the fast decay time can be accounted by phonon-phonon interactions rather than the generation of SCOPs. The slower decay time is governed by the equilibration of the system with low frequency phonon modes. |
| first_indexed | 2024-12-19T10:10:09Z |
| format | Article |
| id | doaj.art-ff8e586790fc455495f2ac8f136785d0 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-19T10:10:09Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-ff8e586790fc455495f2ac8f136785d02022-12-21T20:26:24ZengEDP SciencesEPJ Web of Conferences2100-014X2019-01-012050500610.1051/epjconf/201920505006epjconf_up2019_05006Theoretical study of the ultrashort dynamics in graphene after fs-laser excitationSergej KrylowMartin E. GarciaWe report on the calculation of the full dynamics of graphene after ultrafast laser excitation using ab-initio molecular dynamics simulations. Our calculations show a biexponential decay of the (100) and (110) Bragg peaks in time, similar to experimental results. Furthermore, we calculate the time-evolution of the phonon energies averaged over sets of phonons, chosen by their phonon frequencies. Our results suggest that the fast decay time can be accounted by phonon-phonon interactions rather than the generation of SCOPs. The slower decay time is governed by the equilibration of the system with low frequency phonon modes.https://www.epj-conferences.org/articles/epjconf/pdf/2019/10/epjconf_up2019_05006.pdf |
| spellingShingle | Sergej Krylow Martin E. Garcia Theoretical study of the ultrashort dynamics in graphene after fs-laser excitation EPJ Web of Conferences |
| title | Theoretical study of the ultrashort dynamics in graphene after fs-laser excitation |
| title_full | Theoretical study of the ultrashort dynamics in graphene after fs-laser excitation |
| title_fullStr | Theoretical study of the ultrashort dynamics in graphene after fs-laser excitation |
| title_full_unstemmed | Theoretical study of the ultrashort dynamics in graphene after fs-laser excitation |
| title_short | Theoretical study of the ultrashort dynamics in graphene after fs-laser excitation |
| title_sort | theoretical study of the ultrashort dynamics in graphene after fs laser excitation |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2019/10/epjconf_up2019_05006.pdf |
| work_keys_str_mv | AT sergejkrylow theoreticalstudyoftheultrashortdynamicsingrapheneafterfslaserexcitation AT martinegarcia theoreticalstudyoftheultrashortdynamicsingrapheneafterfslaserexcitation |