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Title: Strong-Field Bloch Electron Interferometry for Band-Structure Retrieval

Journal Article · · Physical Review Letters
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]
  1. Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) (Germany); SLAC
  2. Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) (Germany); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
  3. Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) (Germany)

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±0.04 nm fs–1. As a result, 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.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Accelerator R&D and Production (ARDAP)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
2404904
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 132; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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