| Autor: |
Weitz, Tobias, Heide, Christian, Hommelhoff, Peter |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 132, 206901 (2024) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.132.206901 |
| Popis: |
When Bloch electrons in a solid are exposed to a strong optical field, they are coherently driven in their respective bands where they acquire a quantum phase as the imprint of the band shape. If an electron approaches an avoided crossing formed by two bands, it may be split by undergoing a Landau-Zener transition. We here employ subsequent Landau-Zener transitions to realize strong-field Bloch electron interferometry (SFBEI), allowing us to reveal band structure information. In particular, we measure the Fermi velocity (band slope) of graphene in the vicinity of the K points as (1.07$\pm$0.04) nm fs$^{-1}$. We expect SFBEI for band structure retrieval to apply to a wide range of material systems and experimental conditions, making it suitable for studying transient changes in band structure with femtosecond temporal resolution at ambient conditions. |
| Databáze: |
arXiv |
| Externí odkaz: |
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